Update: Sony has changed the status of PSP and PS One classics to "unsupported" on PS Vita, disabling future downloads. Games that have already been downloaded aren't affected.
Original (4/22): PS Vita owners everywhere are rejoicing. Without any announcement or other build up, man PlayStation One and PSP game are now available for download through the Sony Entertainment Network Store for the PS Vita. Some of us have been waiting a long while to play Spyro the Dragon, Crash Bandicoot, or Metal Gear Solid on the go.
Not every game is available for purchase through the PS Vita store, however. For best results, visit the SEN web store or from your PS3 or PS4 system. The games themselves don't claim to support the Vita, but it appears that most of them will download and play.
If this is in fact a bug, it's possible that games purchased and downloaded on your Vita may not remain available once Sony patches things up. Considering how such a move would be met with resounding disapproval ath this point, it's unlikely to happen. PS Vita owners, here's something to make the summer lull go by a little bit faster. Visit the Sony Entertainment Network store for a full catalog of available PS1 and PSP titles available to play on PS Vita.