By Saheli Datta, Business 2.0 Magazine writer-reporterJuly 24 2006: 12:04 PM EDTSAN FRANCISCO (Business 2.0 Magazine) -- Push media, a long-forgotten late-'90s Internet buzzword, is making a comeback on cell phones.The notion of push was that users would want to have news, entertainment, and other information downloaded automatically to their computers, rather than have to surf from website to w