So, a while back Flordia's legislature put their primary to January 29th in an attempt to gain more influence. Given the size of Florida's population, it would have swamped the other primaries, and since Florida is a very expensive mass media market and impossible to reach through other methods, it would have made sure the primary was about nothing but money. The DNC has now voted to remove all Florida delegates if they go ahead with the January 29th primary - vote all you want, it won't matter.
FDL has the details and background in greater depth for those who want it.