Google has secured @GoogleWebspam on Twitter. Currently the Twitter stream is empty, but the account has over 60 followers.
Both Googler's JohnMu and Matt Cutts confirmed that this account is controlled by a Googler at the Web Spam team.
@Harith, got more info. Someone on my team showed initiative and grabbed that user account, so it is a google account.
Is this account going to be used for submitting spam reports or aiding webmasters in improving their web sites? It appears that it might be for spam reports, since the web link on the profile links to http://www.google.com/webmasters/tools/spamreport?hl=en but it is still early, so that can change.
Forum discussion at DigitalPoint Forums.