By the postal look of the press invites Facebook sent on Thursday, those rumors of a fully featured webmail product for the social network might be true.

Titan, more affectionately known within the Facebook team as the “Gmail killer,” could fix the out-of-date messaging platform to include a personal @facebook.com email address.

AllFacebook has details on the possible features:

  • The next developer platform – You’d be able to attach any type of file.
  • Organization by strength of relationship – This could possibly trump Gmail’s “Priority Inbox”.
  • Document integration – ZDNet states that Facebook’s webmail client could give access to Microsoft Office Web Apps.

Will Titan reinvent the inbox as sources within Facebook claim? We’ll see on Monday at, oh, 10:01 am when the fail whales start popping up.