Has anyone noticed the new temporary 2009 High Limit ($729,500) being offered by any lenders, and if so who?
Furthermore do any AE's or MBS/Secondary folk have any insight as to timing?

It was eligible for sale to FNMA effective May 1st. I am concerned that because it expires December 31st,  it will have little effect if the timeline drags out before it is a reality.

Finally a few are offering it now.  GMAC (decent rate), Everbank, Amtrust and Wells Fargo wholesale.  Wells correspondent will start offering it on 5/11 and they are untouchable right now on agency jumbo (to 625k), so they will likely be best on 5/11.

Today's update: Flagstar will start offering the 729k limit on 5/16.  They've been somewhat out of the market on agency jumbo lately, and they're putting 625k-729k in a separate category (which, of course, means a pricing hit).