John,
While we haven’t tested any of our tooling with Spring 2.0 yet, you can do what Greg said and either update the capabilities libraries under Window > Prefs > MyEclipse > Project Capbailities > Spring, or you can simply drop in the Spring 2.0 libraries into your project and more or less hope for the best; meaning that if validation or wizard errors popup, it could be incompatabilities.
As Greg said official Spring 2.0 support is high on our todo list, we are well aware how much of a front-line player Spring is.