If my phone was ever lost or stolen, my only real concern is data and apps associated with my Google account, such as my Gmail, the ability to purchase apps from the Market, and maybe Picasa albums.

Is there a way to block access to these Google associated programs if I change my password or do something else with my account?

I would also be interested in any solution that remotely wipes my Google data. I know remote wiping questions have been asked before, but I feel that my question is a little more broad, in the sense of overall protection of data in which wiping is a possible answer.

FYI, I'm running a Gingerbread-based ROM on my Samsung Galaxy S (AT&T Captivate).