It's just a JavaScript methodology with a stupid name to make it sound cooler than it really is, so as far as IDEs go, just use whatever you would to edit JavaScript normally.
if your planning on using ajax this is the best implementation of it ive ever used.. And ive used alot of different ajax frameworks (including microsofts atlas and ibms framework) schwarz ajax If your into dotnet then let me know and ill help you even further!
looks good, but seems to be for microsoft only, and my web servers only works with php..... but i will take a look for future projects