Just as an FYI. When people do get jobs, it turns out you can't cancel your health insurance through IBM mid-month. Meaning if you have a start date of August 12th and your new company will be covering you as of August 12th, you still have to pay for the TMP/COBRA through the end of the month.
I just found this out the hard way, hoping to save you guys some $$ when you are thinking about start dates.