There's the usual rumblings and rumor-mongering, but thus far, no news of a PSP2.
I think that the DS Lite should have had the matte casing instead, and the cameras are mostly worthless. Honestly, if Nintendo is trying to come up with more interfaces for games, they need to try harder.
I recall a time when Nintendo was all "our systems are for playing games, and games only", but I see that only a few years have changed that stance. Mind you, they were also really iffy on online gaming, and they eventually got into it... albeit in a really basic, awkward way.