Hi, I'm Ben Combee from the Foleo development team. Here's a few quick answers based on what I can say right now:
1) the power adapter for the Foleo is the same size as my Treo adapter. I usually leave it at home when I take the device with me for the day, and so far, it's not gone dry.
2) the initial release of the Email application on the Foleo will only support sync with a smartphone. We know there is demand for direct POP/IMAP/Exchange access over WiFi, but we wanted to get the Sync usage mode completed and fully debugged before working on the other functionality.
3) The Web Browser doesn't support tabs at this time. There are some workarounds; I have tried out
http://brentalan.com/wiitabs/ with it, for example. We know there's demand for tabs too.
3) Right now, applications always run from internal storage -- Linux doesn't like a executable program disappearing from the system while its running, which is something that could easily happen with a program running on an easily removable SD card or USB drive.
4) It's not over when we release it... we're planning on doing a number of software updates over the life of the product, so just because it can't do feature X at release doesn't mean that it won't ever do X.