OK, a small update to my progress. I got cmake, gperf, and ICU compiled. I tried to create a deb of ICU (because the website says you need ICU to run OWB), but dpkg-buildpackage kept failing, saying some directories don't exist. I then found a version of ICU in a repository (maemo extras? Not quite sure where...), so I think that will work...

I'm currently in the process of compiling OWB itself. However, because my linux box is SLOW (900 MHz, remember?), it has been compiling for 30-45 minutes, and it's only at about 40%. On top of that, I'll probably be going to bed (and leaving for the week, without internet most likely) in about an hour.

So, if I can't get a package built or whatever, I'll try to at least let you guys know if compiling works. Then, hopefully someone else with scratchbox setup can come in and compile quickly.

[edit]Everything compiled fine, but the compiled libraries come in to ~680 mb! Since I'm not booting from SD, that's more than I can handle on my n800. Anyway, I'm uploading my built libraries and binaries to http://truejournals.com/build.tar . You can extract with:
Try to guess where things should go (/usr/local/bin and /usr/local/lib?) and it might work. You'll need icu, though. libicu somethng is in a repository, just not sure which one at the moment. Good luck to anyone who tries this!