My new mac mini wants a password to connect to my wireless network (Motorola SBG900)

hi this is normally printed on the underside of the unit, you have to go into the main user profile to gain access to the network password, the main user name is normally : admin and the normal default password is : password, but this is normally under the unit on its label once in you should be able to find the main network password from there...hope this helps

1 On a computer wired to the SBG900 USB or Ethernet port, open your web
browser (for example, Microsoft Internet Explorer)
2 Type http//:192.168.100.1 and press ENTER to display the login window:
3 In the User ID field, type admin (case sensitive) and press TAB.
4 In the Password field, type motorola (case sensitive) and click Log In to
display the SBG900 Setup Program main window:
As soon as your network is operational, run the SBG900 Setup Program to:

"Wireless Network Setup"
For a LAN with one or more wireless clients, enable wireless security on the SBG900.

"Wireless Network Setup"
After enabling wireless security on the SBG900, as required on each wireless client:
> If you disabled ESSID broadcasting on the SBG900, set the client Network
Name (ESSID) identical to the ESSID on the SBG900.
> If you enabled WEP on the SBG900, set the client WEP key identical to the
WEP key on the SBG900.
> If you enabled Allow Only Listed Stations Access, be sure the MAC
address for each client is correctly listed on the SBG900.

Have you go MAC address filtering enabled, if so you will need to add the MAC address to your wireless router's MAC address table.
It is very difficult to diagnose the problem without knowing your wireless router's configuration and the wireless card configuration in your friend's computer.
The easiest way to give them access is to use a LAN cable, provided you have spare LAN ports on your wireless router.

go the the ps3 network settings. scan for wireless networks and select your network. if there is a password enter it and you'll be connected!

You need to ensure you laptop has DHCP set to OFF and disabled, START>>RUN>>services.msc enter, scroll down to DHCP, set to OFF and Disable.Reboot. Now check that the PC, it must have a login password, must be in same Workgroup, and have Sharing enabled, too. it also MUST have a Name too. The "Other" PC's all need to be the same, workgroup, password, name sharing etc.

Use the Wireless > SECURITY — basic Page to encrypt your transmitted data. Choose one of:
If all of your wireless clients support WPA encryption, we recommend using WPA instead of WEP because WPA:
• Provides much stronger encryption and is more secure
• Provides authentication to ensure that authorized users only can log in to your WLAN
• Is much easier to configure
• Uses a standard algorithm on all compliant products to generate a key from a textual passphrase
• Will be incorporated into the new IEEE 802.11i wireless networking standard
For new wireless LANs, we recommend purchasing client adapters that support WPA, such as the Motorola
Wireless Notebook Adapter WN825G, Wireless PCI Adapter WPCI810G, and Wireless USB Adapter WU830G.
For more information about the benefits of WPA, see the Wi-Fi Protected Access Web page:
http://www.wifialliance.org/OpenSection/protected_access.asp.
Configure on the SBG900 Required On Each Wireless Client
If all of your wireless clients support Wi-Fi
Protected Access (WPA), we recommend
Configuring WPA on the SBG900
If you use a local pre-shared key (WPA-PSK) passphrase, you
must configure the identical passphrase to the SBG900 on each
wireless client. Home and small-office settings typically use a
local passphrase.
Configuring a RADIUS server requires specialized knowledge
that is beyond the scope of this guide. For more information,
contact your network administrator.
Otherwise, perform Configuring WEP on the
SBG900
You must configure the identical WEP key to the SBG900 on each
wireless client.

is there wireless MAC filter enabled on the router ?
If enabled then disable the MAC filter.
Check all the wireless settings of the router
Click Here for step by step solution

1. Try the ethernet cable, but also configure it manually by setting the gateway as 192.168.0.1 and the IP to 192.168.0.2
2. Then enter normally and reconfigure it.

Optionally, try holding the reset button for 20s and access through wireless if you want.

I had the exact same problem w/ the Motorola SBG900 Modem/Roter combo. I used to be able to connect to my wireless laptop and then all of a sudden it just wouldn't anymore. So I finally called Motorola and one of their techs (who's like a genius or something) walked me through this complicated procedure for resetting the SBG900 at my desktop and, after, even helped me to connect to my wireless laptop. SWEET! Don't waste your time trying these internet solutions. Call Motorola tech support at (877) 466-8646. They're open unitl 1AM Pacific Time.

Good Luck,
Chris from Cali

you must define DNS and Gateway!!! Go on My Network Places, right click, again right click on your network, select properties, TCP/IP and in there enter needed IP addresses!!!