I am using IDEA for a long time and I would say it is a great product.
Also I am working on Ubuntu 7.04 right now and what I am missing here is a debian(ubuntu) repository with Intellij products (Idea, YourKitProfiler). APT is so cool tool for managing software so I would like to see idea upgrade process as
sudo apt-get update && sudo apt-get upgrade
or installing idea as
sudo apt-get install idea (so APT will install required version of JDK and another required software)
I understand that checking news site for a new version and manually download and install it not very difficult thing, but I like to automate process that could be.
In this case APT would save several hours of my life...