Drill as a Temporary Dremel?

[Overdriven]

You're not going to be able to use a cutoff wheel for that. There are some Dremel bits that act like a router, but even they are too large for a mini USB, plus they are hard to control.

My suggestion is to drill a series of small holes, you can drill just the corners or drill a complete outline. Then use a xacto or box cutter to play connect the dots.