It seems like Sony is finally seeing the light or "getting their shit straight". On their Japanese website they just annouced plans for PS2 support for the PS3 and PS1 support for the PS Vita via updates. The updates are said to be arriving this summer. As the article is in Japanese it is not known if this will coming to the west at this time.
If someone would be so kind *cough* [member='Densetsu'] *cough* as to translate the article for us it would be much appreciated.
Source
Here's a translation by Google Translate