I believe that we’re going to see some significant post-Rails server side web tools developments this year. TurboGears and Django were both never “Rails clones” because of their history and where they came from. But, all three promote a fairly similar idea of webapps are put together on the server.
Last month, AppJet provided a look at something different. It combined transparent persistence and, importantly, a seamless ability to run code on both the client and server.
I think that Jaxer and AppJet are just the beginning. I’ll definitely be writing more about how the server is changing.
Update: I just noticed that Jaxer is licensed under the GPL. That complicates things a bit, because it seems more like a library than a compiler. In other words, you can’t freely give someone a copy of your app with Jaxer and not be forced to use the GPL. I’m not certain that you could even give them a copy of your app.