It's also worth to mention, that in case for boosting N900 performance via swap on microSD, class 4 SanDisk (old ones, before two-coloured version) are performing best. You can find ones up to 32 GB, most likely, used (but wear shouldn't be a problem, if you buy from someone presenting bad block test with al green, and you can confirm it yourself. Most users don't ride those high-capacity cards to death, using them on camera etc only, not for swap, like us ).

/Estel