Provide up to the minute mac news, or juicy rumors. (i.e. MOSR, Think Secret, and Mac Minute)
Mac Minute has only jumped on recently, but since it had the cleanest, fastest site, with continually updats, I chose it over other sites, as my first and most common visit. In the case of MOSR, they are right sometimes, but sometimes they also tell people what they want to hear. THey also seem to have a winning combonation. SpyMac is an example of a site that took the telling people what they want to hear a little too seriously, though they have improved recently. Even if you are not producing a mac related site, I'm sure you can draw similarities. This is just an echo of what was said above, w/ a few examples.