Rounded cables blowout at CompGeeks - Glow in the Dark, EL Sound Activated, Color
Linky to Rounded IDE/Floppy cables
All types of colors, glow in the dark, and sound activated EL IDE cables
Also remember that this is THE place to get USB cables (extension and A to B) ... all the other stores like Wal-Mart, Best Buy, CompUSA, Staples, etc. charge $10-$20 for USB cables, they're only $1.25-$1.50 here.
Also, you should be able to use the coupon code MCEXCLUSIVES (is GOTAPEX another valid one?) for 10% off