Hmmm, that is odd, it seems I was sent an invite this weekend that I had been sent before for google talk. When I clicked it I got
We're sorry. This invitation is not valid. We monitor invitations to protect our users and to prevent abuse. If you'd like to sign up for Gmail, you can now do so using your mobile phone. Click here to sign up (US only). Otherwise, please ask a friend with an account to invite you directly.
It was not till I cleared me cache, history and cookies that I was able to login to gmail.