I'm having worse problems... When I open the lid, sometimes it won't even connect at all. During this point, if I select the wifi network it will endlessly try to connect (I let it sit for an hour once while watching tv). I have to turn wifi off, and turn it back on in order to connect.
Lately though, it's been connecting (or at least claiming to be connected), but it won't transmit any data back and forth. Littlesnitch detects no data.