Some lucky people got a little preview of the Qore June 2009 episode. In it was a preview of the new PSP Go. It features a slide-up screen that reveals playing buttons. It is also UMD less, which means downloadable games will be coming. It also has bluetooth, and has 16GB internal memory. Apparently, its slated for a fall release, and its not expected to replace the PSP-3000. This is just a new SKU for PSP, its not a PSP2. The other this worth noting is that this is supposed to be a premium and digital alternative to the current PSP models out there. Those who still want to rely on the UMD can go for the PSP 3000 model, as games simultaneously release on UMD and in the Playstation Store. For any other pieces of info, we'll just have to wait for E3. And for those wondering, yes, it does look like Sony's Mylo.
[Source] - Playstation Forum
More pictures:
VIdeo
Unfortunately the sound is off. Bare with it.