The July 2006 issue (#192) of Circuit Cellar Ink has an interesting AVR programmer project by Bruce Lightener.
Basically he took the AVR910 and ported it to a Tiny15. Fits inside a DE9 connector hood. Uses SPPT (command line tool) for programming, I didn't see any reference to Studio4.
Might be nice to see a USB version, which wouldn't have to steal power of uncertain quality from RS232.
He made GCC work for him on the Tiny15. He wrote a PERL script that inspects the assembly output for instructions that need RAM or stack, and then he tries to rewrite the C to avoid them. Seems like a lot of work compared to just writing assembly, but it's an interesting discussion.