I saw this link about programming ATTiny:
is it possible to make an ATTiny board to replace the Uno for programming other ATTiny chips?
they appear to have the same pins that are used by the Uno; 'SCK, MISO, MOSI'...
http://www.sparkfun.com/products/9825 i think this might help .
the link isnt working for me
As far as I know... you can't use UNO to program other AVR's...
you should better use an AVR ISP programmer... like the one from Lady Ada the USBTiny ;) it works for me :D
well you can, check out the link i posted.
you just have to add some stuff to your arduino installation and run a sketch that makes the Unointo an ISP.