Overstock.com has the SiPix A6 Palm printer for $25, or $30 if you've already taken advantage of the $5 off coupon. The printer prints on fax type paper and connects to your Palm haldheld via infared. My friend used to have one of these and it seemed to work pretty well, but don't count on doing big school papers on it, obviously.

http://www.overstock.com/cgi-bin/d2.cgi?PAGE=PROFRAME&PROD_ID=420820