I expect a lot of users are patiently waiting for Mathcad Prime, which was intended to be released by the end of 2010. Any update from Mathcad / PTC on the expected release date now that we have just entered December 2010??
I understood that there would only be a limited release to 'trial' customers this year, and then post evaluation it would begin release say 2Q11. This would allow them to properly position the first release, which as most know, isn't a full replacement, so it woun't be for everybody.
As Philip mentioned, Prime 1.0 will not have all features that Mathcad 15 has, so while I am waiting for it to be released, I'm more excited about future versions of Prime if I'm honest.