There's nothing on the GSN site about a new date.
Wait a minute--you gave the date and then said "nothing on the GSN site about a new date"? Which is it?
Watching the show I recall hearing that a pilot for Wits & Wagers with Felicia Day as host was either shot on in the works. There were no ways that Winsanity was qualitatively better than W&W, other than the themed rounds--GSN would have done better to jump on the original article.
(To clarify: from what I recall the pilot was shopped for syndication around the time that Celebrity Name Game was on the air. The W&W pilot was not done specifically for GSN, but wow would that fit in with what they've got now.)