Theres a great podcast on TalkCrunch with a discussion between executives on 4 major online feed readers: NewsGator, Attensa, Rojo and Feedlounge. I had a look at a few online feed readers a while ago and I settled on Feedlounge as a good migration from NetNewsWire. In my eyes Feedlounge certainly gives the best user experience: the liberal use of AJAX means no page refresh; none of the other readers seem to do the 3 pane thing or render the pages as well as Feedlounge (Alex mentions that he came from NetNewsWire and I think it shows), its just unfortunate that you have to pay for this usability and that it doesnt yet sync with NetNewsWire, Id really like to see the usability of Feedlounge with the functionality of the NewsGator and NetNewsWire combo (free would be nice too, certainly cheaper). All 4 discuss the future of their respective readers and the future certainly looks rosy, I for one shall be keeping an eye on these an any more which might turn up.