Alright alright, not that religious war again, please... Alladin is a commercial company releasing freeware, shareware and commercial products for both the PC and the Mac. When .sit is 20% smaller than .zip it means that a 5MB .zip file could be a 4MB .sit file instead. This saves the creator 20% bandwidth and the user 20% download time/costs. If people know about this and still prefer .zip for whatever reason, it is perfectly fine. However, if people just don't know about it (but would like use the 20% for something good or better) I think it is just a bit sad and it'll be a good idea to simply tell them about it. That's all. None of this has anything to do with Apple - a .sit file compressed on a PC is still smaller than a typical .zip file... :-)