The point ProgramSynthesizer though, if it is to be permanently wedged in the Jornada running linux transfer speed is not an issue
Although i would hardly call a running linux system "Intermittent Use" - it's going to be writing to log files a fair bit, and you will probably need a swap partition. So you might want a reliable brand. There were reported fakes of SanDisk cards on ebay a while back, so be careful if you go for these.
I use a 4GB Transcend and haven't had any issues so far, but then i hardly boot linux as i'm waiting for the Sound driver and suspend in a newer kernel before i consider running it full time.
Also i think i read somewhere about something in the bootloader that would dump the device ram to CF and restore it on shutdown so you don't lose your CE setup - if this happens i'll sell my second
(test
) 720...