Our library got the Latitude with built-in wireless. The reception is decent, but not that great.
I just walked into a room and the signal dropped to 25% of maximum potential (2 Mbps or something like that). I walked downstairs one floor down (about 15~20 feet below the WAP, although not directly below, I lost signal completely). But then it is an old-school building and reception for cell phone and everything aren't great. But I was quite struck when I lost so much signal by walking into a room, which, btw, has glass doors and I can face the WAP almost directly.