Thanks, but I think I've done that. I'm using Eclipse and I've added the LWJGL jar's to
Project -> Properties -> Java Build Path -> Libraries
Like previously mentioned, it works perfectly well for LWJGL 1.1.4, but not for LWJGL 2.0 rc2 (or rc1).
My question was: In LWJGL, how come Eclipse won't find org.lwjgl.util or anything in it, but it finds everything else, like org.lwjgl.opengl, org.lwjgl.openal, etc?
Since it works in LWJGL 1.1.4, clearly I'm doing things correctly in Eclipse (i.e. the jar's are on the classpath and, needless to say, I'm importing them).