Google has released a set of additional webmaster tools to dicover more links to your site, and ven download them, etc... (see http://googlewebmastercentral.blogspot.com/2007/02/discover-your-links.html).
The feature requires either uploading and html file ('not good' for wp.com ;) ), or including a 'meta' tag in the first <HEAD> section of the page, before the first <BODY> section of the type <meta name="verify-v1" content="xxxxxxxxxxxxxxxx" /> (where "xxxxxx" is unique to you).
How hard, feasible, desirable would it be to create the tag by default for all blogs, letting us fill the "xxxxxxxxx" part within our dashboards?
(Then again, this may be in plan for the April stats surprise... :) ).
I hope I was clear enough, I need more coffee this morning...