Hope you get this in time. Definitely check out:
Mississippi Street
Alberta Street (close to Kennedy School, which you mentioned. Sidenote: Kennedy School is fantastic to check out & walk around, but do yourself a favor and eat elsewhere.)
Music Millennium (33rd & E. Burnside) if you want to browse music
811 E. Burnside shops: Lots of small, indie boutiques & shops, across from the Doug Fir hotel/restaurant/club (where Tom and countless other guests have been unable to sleep at night, due to noise from club)
Locals can be kind of blase about it, but SE Hawthorne Ave. is still fun to walk around
That's all I can think of on two cups of coffee, but I'm sure you'll find plenty to do. Have fun!