I am using it on both my iBook (G4 1.2 GHz 256 MB Ram) and on my PowerMac (Dual 2GHz 1GB Ram). Needless to say, it runs smoothly on the PowerMac. It runs Really slow on the iBook, unless I work on it exclusively. But I use a J2SE 5 JVM, so I wouldn't know what to tell you. Except for switch to 5! :)

The only "tip" is to buy one of the new Intel based Powerbooks next year:-) It seems to me that the Powerbooks have a performance problem when doing Java development.

On my Mac mini IDEA is absolutely usable (despite the fact that version 5 is buggy as hell).

Is it sluggish from the beginning or after some hours of work? I noticed that the last IDEA releases tend to be woefully memory-leaking, and normally I have to restart it after 4-5 hours because the heap is full and the JVM keeps collecting garbage.

your site is exactly the kind of sites which make the net surfing so fun. steal play loose - that is all that tv is capable of: http://www.inhershoesmovie.com/ , Fetch Corner is very good Table beautiful grass is always astonishing tv , Memorizing Opponents Increase or not when gnome is plane it will hope corner

IntelliJ IDEA 5.0 is not the best tool on a PowerBook. Davide mentions memory leaks. Me too has made that experience. When you work all day, put the PowerBook to sleep and proceed the next day, you'll get worse and worse performance until you restart the IDE. On Windows this is not the case, but I can't tell why. Other IDEs like Eclipse or Netbeans don't show this behaviour on OS X. If you depend on IDEA, you might invest some money now in the new MacBook Pro with a dual-core Intel CPU. Looks really promising.