If you guys are kind of upset about not being able to run mountain lion on power pc and you want to run some newer software then I suggest you try ubuntu . It is great you get the latest version of firefox on power pc and a lot of other software is the very latest too . With some macs you have to do some extra work to get it to work right but it is worth it trust me . You can dual boot ubuntu and mac os x pretty easily as well so you get the best of both worlds . I would suggest you give it a try here is a LINK to where you can download it . Also if you need help doing it here is a link to the ubuntu power pc FAQ LINK . Give it a try and let me know how you guys like it I thought it was pretty cool a lot better than yellowdog linux at least for me .