You are not entitled to anything. Who ever said Vita should even support your PSP games? You can play them on your PSP no? You're lucky you can even do this at all.
$12 seems a bit high, cheaper price would be nice, it will probably translate to $10 on average (usually cheaper than direct Yen conversion), but can't expect it for free as they would only lose money, this is business.
Been looking forward to it ever since it was shown off at PAX.
Remind me of Rainbow Six Vegas (cover system) but with full dynamic destruction, and I loved Rainbow Six Vegas, and I love destruction. YES PLEASE! Will definitely buy, this game will sell itself if people like the trial on XBLA. $15 will have a lot of impulse buys, as long as there are enough people playing I will be happy.