I have made a .tar.gz of libqt4 which includes test applications but I didn't know somebody else was working on this. Good. There are a few details in Developper section.
No virtual keyboard is integrated in my release.
As it's something like 200Mb, I have no practical way to share it...
For the impatients, if somebody has an ftp server to host this first release, he can PM me, I'll upload it in 6/7 hours (currently at work, no ftp access..)

All this to say that yes, qt4.3.2 is ported to the bora release without a lot of difficulty. This amazed me, it's one of my 10 first ports. It's not even Qtopia for embended, it's the real qt
I don't have the time at the moment, next week I'll get back to this. I need to make a .deb (standard procedure doesn't work so I will use something like pypackager) and integrate the keyboard. Then some apps can be ported.

edit:
to repeat, it has been tried on bora/OS2007/n800. I still haven't had the time to upgrade my development environment to chinook nor to try the OS2008.