AVR-Chat

I need to order some more sot-23 package transistors from Digikey... The
supply that I have now, which is dwindling, came from someone on Ebay
and the tape was marked 2n3904 and 2N3906.  When I look at digikey I can
not seem to find these in a sot-23 package.  I am a biologist who plays
around with electronics so all the stats for the transistors make my
head spin.   I just need a basic NPN and basic PNP transistors for
switching and basic amplification; and the cheaper the better.  Can
anyone suggest such beasts?
Thanks,
Daniel