I started a project named Mokofuel on openmoko to replace pfuel on palmos. If you're interested in, please contact me at "fredo __please_replace_this_with_at_ starox.org".
Technically, it uses an ui glade file for ui and I'm digging sqlite for backend. One database file per vehicle. I hope using .glade files, allow me to keep the same codebase to develop both pda and desktop application.
I'had moved, and currently, I'm without internet connection. But I can read and write mail as well surfing at work.
I'll be back asap and keep maintaining this page.
If you will or you had started a similar project, please inform me.