To enable compile time weaving of the spring aspects (spring-aspects.jar) in Intellij IDEA (I am using 7.0.3 - but I assume this to be similar for other versions):
NB: As of plugin 1.0.7 it requires AspectJ 1.5 (I use 1.5.4) - 1.6.0 does not work. This means amongst other things keeping to spring 2.5.2 - spring-aspects 2.5.4 seems to use AspectJ 1.6.0 (at least it complains about weaver version 3.0 vs. 5.0).