I appreciate that Google is being proactive on this.

One question, though...I noticed it because my phone couldn't connect to e-mail.  When I logged in from the web site, it told me about the "suspicious activity" and had me change my password.  Had I not noticed and done this, and had someone hacked my password (not possible, since I didn't use the same password for MtGox as I did on Gmail, both were independently generated random strings), wouldn't they have just gotten to pick my "new" Gmail password when they logged in with the old one?