I'm working on them now. Only have 8 rebates this year for a total of $104. I love the Staples and CompUSA rebate systems but even the CC rebates are easier than previously because you can enter your info online and they complete the forms for you. You still have to print them and mail everything in, but you can track them easily if you fill them out online.
I do miss the excellent OM rebates but I understand why they stopped doing them (because there were so many customer complaints). I probably had to resubmit 25% of my OM rebates before getting them and sometimes even had to go to the store manager for them to resubmit or give me a store credit for my rebate.
The most important thing about rebates is to keep a copy of everything and be willing to follow up if/when they don't come in a couple of months.