CDRLabs.com

Right here:
http://www.compusa.com/adproducts/html_ad/default.asp

Some highlights:

D-Link 10/100Mbps Fast Ethernet PCI Adapter
$9.99* (#301595)
*after savings and rebate
19.99 -5 instant savings -5 mail-in rebate
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Buslink 48x12x48 External USB 2.0 CD-RW Drive
$49.99* (#295123)
*after savings and rebate
99.99 - 5 instant savings -45 mail-in rebate
Quantities limited to stock on hand. Not available in all stores.
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Maxtor 160GB, 7200RPM, Internal Ultra Series ATA/133 Hard Drive
$119.99* (#300018)
*after savings and rebate
179.99 -20 instant savings -40 mail-in rebate
Quantities limited to stock on hand. Not available in all stores.

Also don't forget Sunday, 7/20 is the last day for their 30% off for all DVD blank media. For example, CompUSA brand 5-pack 2.4X DVD+RW for $10.49 or 50-pack 2.4X DVD+R for $48.99, not great but decent enough.

7/19 was the last day for that.