Every new design for each denomination they come out with, I put one away, and I have been waiting since the original 2005 release date of the new $100 bill, to get one. Then they delayed the release of the $100 for a few years, to explore new security features they could add to the denomination, then there were several years over time that they were going to release it (2006, early 2008, late 2008, 2009, 2010, and finally Febuary 10, 2011), which was later delayed even furher, due to printing problems. The new $100s are finally slated to come out later this year, but a release date has not yet been announced, however, I feel it will be released anywhere between September and November, as most new U.S. currency designs comes out in the spring or fall, and I am guessing that they will want them out for the holidays, when large amounts of currency are spent.
And one other thing. Unlike with the $5-$50, when these new colorized $100 bills come out, ALL old non-colorized $100 bills, no matter what shape they are in, whether fit for circulation or not, will be pulled from circulation, and shredded as they are received by the Fed for some reason, I guess they just want the new design $100sto really take over faster than the other new colorized denoominations did.