Looks like Sony Japan is still pumping out new designs.
http://mobilemag.com/content/100/337/C3200/
The new PEG-VZ90 has a 3.8” OLED screen and is designed for watching videos using Palm OS 5.2.1 in the background. 4-12 hours for MPEG1 and MPEG4 playback or up to 42 hours of ATRAC3 or MP3 playback (with screen off).
And yes, the screen slides up to reveal the controls.