We recentlly had to convert a few b2Evolution blogs to WordPress 2.8, something that is apparentlly common but not very standardized. Thus, after some digging I found a script, but it did not work with the newest versions of each component.
After a few tweaks I was able to get it working again, and now I would like to share the result with this slightly modified b2Evo to WordPress Import Script:
If you are trying to import from another system, this codex link may be of use.