Might seem like a stupid question, but can your roommates connect to LW?

Have you always seen the firewall icon or has it just appeared since you haven't been able to connect?

It seems like AT&T block p2p sometimes, check out AaronWalkhouse's posts in these threads...
http://www.gnutellaforums.com/showth...ghlight=AT%26T
http://www.gnutellaforums.com/showth...ghlight=AT%26T
http://www.gnutellaforums.com/showth...ghlight=AT%26T
http://www.gnutellaforums.com/showth...379#post202379

If it's not down to AT&T, there might be some firewall that's associated with the condo's internet. You could talk to the manager & find out if anything's changed within their setup recently.

You could try changing ports, no guarantees that it'll work. In LW go tools > options > advanced > firewall config. Change LW's listening port to something in the range of 49152 - 65535 (say 64049). If you've got port forwarding in place for your router, you'll have to change the port forwarded to the same number.

Is there any other model number on the router (what you gave me matches a couple of routers, wireless adapter etc)?

It's not going to fix your connection problem, but you might want to update your Java...once LW's working again you'll probably find it performs better with a newer version of Java. Use the JRE offline installer here & remove your old Java version before you install the new one.
http://java.sun.com/javase/downloads/index.jsp