- You have a right to be pissed about proprietary cards. Proprietary anything rips off the consumers. The only reason they do this is to stop piracy, but my guess is it won't even be half a year before Vita games are getting pirated.
- That is a concern, with the hardware I see third party studios being around for a while. However, if the system doesn't sell, then the third party's will go away. There's no reason why first party titles wont be great for the long run though. Square Enix is kind of feeling out both the 3DS and Vita to see where their support should go.
- Vita works on Android marketplace. A lot of Android games will work on Vita, requiring only built in support for it. Xperia Play games will be compatible as well, which are comprised mostly of PSone games.
Basically, I recommend you wait unless there's 3-4 games at launch you want, in which there are for me. I like Gravity Rush, Hot Shots Golf, Modnation, F1, Uncharted, and Touch my Katamari. It's unknown whether some of these are launch titles. There's also a PSN downloadable Motorstorm game coming day one, comprised of top down style RC cars. The cool thing about that one is if you buy the Vita version, you can also play it on PS3.
 I noticed in the Uncharted: Golden Abyss trailer that you can play through w/o using the gimmicky touch and motion controls. I hope all games have this option.