Anki works for N900 for me after the PR1.2 update. If you install from app manager, it has some missing dependencies. You have to install rootsh from App Manager and run the following in terminal:

sudo gainroot
apt-get install python2.5-qt4-gui
apt-get install python2.5-qt4-webkit
exit

Now, try running Anki by issuing the command

anki

If it starts up without problems you may also launch it from the shortcut. If not, note down any error messages, see if this could be resolved by installing some other dependencies, or post back here for help

The only issue I'm having now is that the anki files from my computer are newer than the version for N900, so I can't use them, and the sync doesn't allow images. Maybe I'll just need to wait for the next N900 release...