Cracked screen, menu buttons non-responsive, need to wipe my phone! Ideas? HELP!
The answers to Is there any way to erase personal information from my phone that has already been stolen? might help you here. Although your phone hasn't been stolen, the same solution seems like it would be appropriate to your case.

If you have sensitive information on your device, and your company doesn't already have a way to remote-wipe it, then what you work for is an in-security company. You should figure out what to do about lost or stolen devices before it happens. Right now, you're putting your customers at risk.