Maple 15 will soon be released (looks like sometime in April based on the last two relese dates). It also looks like Maplesoft, recently, has settled into a happy release date schedule of April and October where we can most likely expect a major release or update to be available.
It seems ironic that the even releases of Maple seem to be the most successful. Maple 10 was more so than Maple 11 but probably due to it's long 2 year stay before...