From my vague knowledgeabout the sony network, simply because there are very few and general statements, it does not seem much different from PS2. It probably won't be that impressive or really that comparable to the 360. Developers will probably have to run their own servers as well.
Personally, I'm not psyched about it but I really don't mind not having such as unified a structure as 360. It does not matter to me if I have a universal account or anything, all I care about is that I'm about to play the game online and for free.