Congrats on your purchase and welcome to the forum. I can tell you what I did for the entire week, while waiting for my N810 to arrive... I read & read & read some more of the threads/posts here on this forum and I started making bookmarks for those that I would need after I finally got my precious. There is a ton of information and how-to's already available here and I personally think it made setting up and hacking my new machine go a lot quicker.

I too am a student (Molecular Biology) and got the N810 for both entertainment and productivity. I've got 9 textbooks (pdf and plucker) and a ton of journal articles. I highly recommend checking out FBReader - it will read plucker docs and I use Sunrise on my KDE desktop to turn entire websites into Plucker ebooks. The built in pdf reader is powerful enough to handle a 1200 page, full color pictures, Biochemistry text book As for where exactly to find online texts - all I can say is google is your friend.

For PIM & word processing - well, I've managed to fix the issue with lack of Maemo apps by installing KDE (all hail PenquinBait !) Now with the $30 iGo BT keyboard from Amazon - I'm all set up to do pretty much anything I can do on my home PC. Plus, as Benz mentioned, I can entertain myself while riding the bus.