I'm not sure where exactly I found the link to the More Stuff 4 Less Bargin Blog, but whoever I got it from I'll have to thank them. This blog lists all kinds of sales/rebates/coupons for snopping online. Some of them are pretty impressive, for instance:
Outpost.com - Western Digital 160GB WD1600JBRTL UATA100 8MB Buffer HD $159.99 After Rebate.
Outpost has the WD 160GB 72000 RPM special edition hard drive with controller card & 3 year warranty selling for $259.99. A $100 rebate brings that price down to just $159.99 plus shipping. Sales tax for AZ, CA, CT, OH, TX and NV. [More Stuff 4 Less Bargain Blog]
Quite a bargin I must say.