I did a complete HD format and reinstall of SL 10.6.0 and now my wifi is absolutely terrible. Restarting the network doesn't fix the issue. My win 7 machine can download the 10.6.8 update here: http://support.apple.com/kb/DL1399 in way under an hour. But with my macbook unibody 2.4 early '09 I'm getting 32kbps and about 9 hours... I do vaguely recall an issue with wifi after getitting the machine. Even to fix the issue I have to be frustrated for 9 hours. It's insane apple can't issue a fix in the firmware rather than just a software update