HACKED!
My email got hacked this morning by some spammer in Hunan, China. The only harm done was a spam email sent to 473 of my contacts whose email addresses begin with the letter A-I. There are some features about the email that make me think it was an automated cookie theft, rather than someone brute-forcing my password and browsing round my Google Account. Anyway rest assured that my account is back under my control, and apologies for the unwanted offers of cheap software.