Apparently, I was not the only one having this issue with WiFi.
http://discussions.apple.com/thread.jspa?threadID=1156135&tstart=0
http://discussions.apple.com/thread.jspa?threadID=1167675&tstart=0
Though, someone found out that DNS was the problem. So here:
http://discussions.apple.com/thread.jspa?threadID=1169710&tstart=15
http://discussions.apple.com/thread.jspa?threadID=1156135&tstart=0
http://discussions.apple.com/thread.jspa?threadID=1167675&tstart=0
Though, someone found out that DNS was the problem. So here:
http://discussions.apple.com/thread.jspa?threadID=1169710&tstart=15