WHITEROCK  Wow! Another annual tax. Just a mere $2600. (If you're not upgrading.) They never fixed the obvious bugs in CS2 but moved on to CS3. And now CS4. They don't give updates on CS2, so work around the bugs and save an enormous amount of money. They have an opinion of themselves even more inflated than the price.  
(Version 4)

WHITEROCK  Just another tax. There hasn't been a significant improvement for several years/versions. Perhaps they've fixed a few bugs that should have been fixed for people who actually bought version 12. This is nothing but a money-grab of the uninformed. It's obsolete anyway.  
(Version 13.0)

WHITEROCK  SIMBL just put out an update so maybe Acidsearch will be updated soon. OSX 10.5 might be another problem. The author of Acidsearch doesn't accept email so let's hope he knows about SIMBL.  
(Version 0.62)

WHITEROCK  Lovely. Another annual $80 tax for StuffIt. No new features, maybe more efficient. Version 11.0 was so bad it trashed older compressed files and crashed while attempting to compress large files.  
(Version 12.0)

WHITEROCK  Application does the described job perfectly. If, however, you decide Entourage is no longer for you or that Mail has finally evolved enough that you want to use it instead, you're screwed. Software Update won't help. You have to download the combo updater from Apple and open it with third party software such as Pacifist to reinstall iCal. This author should provide an "uninstall" application for iCal via Entourage.  
(Version 1.0)