Florida is considering changing their primary election date for the 2012 and has a commission that will determine the date. The article linked below raises an interesting point, which is that elected officials rarely consider the implementation question when they make election laws. The best recent example of this was Washington DC, which expected their election board to implement a half dozen major reforms flawlessly with less than year lead time. Given the difficult environment in which they work, managing a quasi-volunteer workforce, the need for lead time is key in implementation.

http://blogs.orlandosentinel.com/news_politics/2011/06/another-elections-surpervisor-has-concerns-over-elections-law-changes.html