I take notes on the built in keyboard, have been for many years now.. I generally leave my backpack in my car and take only my Zaurus to class.. I record one lecture a day because I find I just dont take many notes for that class.. the rest I hack away and take a ton of notes on... using basic text editor I write several pages a day, they are timestamped and I can copy/paste and re-organize em on the fly or later.. I perfer this to drawing arrows to connect unorganized notes.. Ive been wanting a pocketop keyboard for a while now, but I can work w/the built in keybd faster than I can write with a pen due to the fact that ive got very bad carpel tunnel, go figure.. typing=good, writing=bad
I cant type notes and record a lecture at the same time, the mic picks up the keypresses.. the 5600 has a built in mic but that is the only port that is blocked by my case (because its on the back) so I took a cheap computer lapel mic and cut out all the cable and spliced it almost directly onto the plug.. then with some electral tape I ended up with this:
http://www.nayr.net/images/ubermic.jpg Sure it looks ugly but I think the quality is much better than the built in mic anywase.
As for drawings, if they are left on the board after class I go up with the camera and take a series of closeups and then I can paste them all together in a collage later if I need them. or if I cant get a decent picture (admit it the sharp cam is crap) then I use a simple drawing program (forget which one I have installed) and try to re-create it.
Another nice thing is accualy using the PIM tools to keep organized, I dump all the due dates and test days on the calender so they dont sneak up on me so easy..
Having the wikipedia dictionary with zbedic always comes in handy, also I find it handy to scan the class sylibus into an image file or just email the professor and ask for a pdf version of it.
I tried OZ for a very long time but it is just far to unstable to be reliable for my daily (ab)use..