Apple claimed in one of their developer emails that everyone who gets a monthly mailing will get sent a copy of Jag. Also, from what others have said in the student mailing list, students have received every single version of OS X.
I find it surprising that Apple has not already posted 10.2 off to student developers since it would surely be advantageous to them to get all the shareware/freeware and so on working 100% on Jag. I hope they post it soon. I can't wait to start playing with it! :-)