For starters, check out the thread "Wireless 101" I posted a few weeks back.
http://www.tfproject.org/tfp/showthr...t=wireless+101
A couple of questions will help us give you the best advice.
1) Do you have 'line of sight' between the two buildings?
2) How far apart are the buildings?
3) Do you want to connect two seperate LANs, or create one "wireless network" between the buildings?
4) Are you going to use the WLAN for gaming, broadband internet, simple file sharing etc?
5) What is your budget?
My
personal recommendation is for Linksys, if for no other reason that it is highly rated, supports WPA (the latest and currently unbroken wireless security standard) and is very easy to setup.
Of course, if you have the cash, go out and buy some Cisco Aironet stuff instead!
Mr Mephisto