The Boogie Board Rip is the model I've been wanting ever since I heard about the Boogie Board last year. It's the first Boogie Board that lets you save what you sketch.
It saves each screen capture as a PDF and you can transfer the PDFs to your computer over USB.
There's no info on how many screen images you can store nor did Improv mention if you could pull up old notes and edit them. Update: Improv told me on Twitter that the Rip could save about 200 screen shots at a time. It cannot load them again.
Cost wasn't mentioned, but the Boogie Board Rip will go up for pre-order soon on the Improv website and it's going to ship in November.