I use a secondhand HP Journada 720, which I got for about ?90. I bought it especially for running JPWce, which I find indispensable on both PC and palmtop.
I recently added the Pocket PC version of Supermemo and and after many difficulties, managed to import the RTK1 kanji and meanings for review purposes. Frankly the result is clunky compared to this site, but works in a similar way, except it doesn't have the brilliant "study" facility that we have here. Still, as it's portable it gives opportunity for study on the move (I don't have a laptop and don't fancy dragging one around either).
I recently added the Pocket PC version of Supermemo and and after many difficulties, managed to import the RTK1 kanji and meanings for review purposes. Frankly the result is clunky compared to this site, but works in a similar way, except it doesn't have the brilliant "study" facility that we have here. Still, as it's portable it gives opportunity for study on the move (I don't have a laptop and don't fancy dragging one around either).