And even though the producers are gonna actually introduce her this season, I still say that the mother was both the Slutty Pumpkin and the blind date that Ted never met up with. (And I'm hoping beyond hope that it's the coat girl from Okay Awesome, too, but I know that's not in the cards.)
[NOTE: I'm repurposing this thread just a little. It's now the thread for all unspoiled speculation. Please remember that per the FAQ, first party promotional materials are not spoilers, so you may find them discussed in here. I'll unpin this note in a week or so, after everyone gets used to the change. --Barnes]
Edited by TWoP Barnes, Nov 15, 2007 @ 9:07 AM.