As of 20061209 the data binding projects are compatible with Eclipse 3.2, this will be in 3.3M4. There weren't major issues, just compilation errors from using a couple 3.3 APIs. But they're now fixed and we jive with 3.2 as well as 3.3. The goal is to stay compatible with 3.2 as long as it isn't prohibitive to the projects. We'll do our best to keep it 3.2 compatible. If we can get to it we will be attempting to use the 3.3 viewer APIs when creating builders for viewer bindings. When that occurs we'll try to come up with a 3.2 compatible way to handle this as well.
See bug bug 164134 for details.