I guess its just me but I've never had a single problem with rebates. I've had 5-6 of them on my new computer pruchases in the last 6 months or so.
2 rebates on a Motorola SB cable modem bought from CC, 1 rebate from Circuit City and one from Motorola
2 Logitech rebates, one on my 5.1 speaker setup and one on my MX510.
1 rebate on a Creative Audigy2 Card
1 rebate from EVGA on a motherboard, videocard bundle
Those are just the rebates I can remember from the recent past, and I know for sure I got everyone of them and cashed them all too. Oh and I bought a new phone from Verizon and got that rebate too