Why Network.com is different
I believe your comparison of Network.com's current service with AWS is comparing apples and oranges. As you say, NW.com is specifically for batch job processing - it isn't designed for, quoting Amazon, "Web Service" hosting.
The NW.com core product is the Sun Grid Compute Utility. It's a grid based utility for people needing to get compute work done. The billing is per-CPU hour, not per-instance, which reflects the different target audience who aren't looking for a minimum amount of load handling on a web site, but have a number of compute jobs whose run time is probably finite and fixed, unlike that of a web service.
I've had a play with Project Caroline - it's an exciting research project and shows off some of the Platform-as-a-Service features such as completely dynamic networking. Looking at the forums, there are already people trying to replicate the infrastructure based on the opened code, which is interesting.
I'm not sure that AWS is the perfect underlying platform for Project Caroline software, nor do I think it's a platform that everybody can move to. There are clearly much lower level networking and storage blocks that they are using to build up the featureset, which I believe would be difficult or not as efficient to replicate.
Another point is that Amazon's secrecy over AWS is losing them customers in some sectors where regulations or customers need to ensure the security of data (for instance). This was evident talking to people at the recent CloudCamp London event and isn't something that AWS is catering for well. For plenty of people, the loyalty to one company or another isn't just based on price!
There are other providers springing up (Flexiscale in the UK and other US based firms) who will hopefully provide their own unique features and different pricing models, perhaps plugging some of the holes.