Again. I think you can make calls via VoIP with a bluetooth headset. But regarding the Flash and calling issues, I think that'll be corrected soon. Adobe is a little pissed they haven't been included yet, however, the only phone I've seen with Flash has been the Pre, and it's not released yet, and it SUCKS. I think Apple is waiting till the technology is a little more refined.
Even still, this is a GREAT read. Really captures my point of view that while this iPad may not be for you, the iPad is the first step towards a lot of potential.
http://www.stephenfry.com/2010/01/28/ipad-about/