Web2.0 however you define is very cool! Many new mashups have been created based on open internet application APIs like Amazon, Flickr, Google maps, del.ico.us, and others.
Part of what many are calling Learning2.0 includes the next generation of online gaming engines applied as training environments. It look like a few adventurous souls have started creating fun games using open APIs.
I'm not sure what it will look like but if someone would kindly create a nice Open API LMS then we could finally get to the idea of Learning2.0 as being about the learner.