MattChaput, for Java development, but JayEdit for writing XmlDocument?s. Why is Eclipse so pathetic for XML out of the box? Why are plug-ins in Eclipse so painful compared to JayEdit? Sheesh.
WilliamUnderwood -- who is amazed that he hasn't put himself on this list yet; I've been using this for 3, maybe 4 years, for java and more recently for scheme and other lispy languages.
DaveVoorhis -- switched from NetBeans to Eclipse over a year ago; mainly for developing the RelProject. At work, we're putting Eclipse on the machines in the student labs.
ChrisHines -- Using it for work (Java development) and also building an RCP app in my spare time.
GeoffSobering -- IntellijIdea is the default IDE where I work now, and I really tried to learn it, but in the end I needed to get some work done and I fell back to what I've been using for a few years now - Eclipse...
MatthewFarwell -- I've used 2.3, 3.1, MyEclipse?, Rational Functional Tester (based on 3.0) and WSAD (based on 2.3). Using it for Java. We had a license for JDeveloper, even used it but Eclipse blew it away.
PaulBrowne -- using it for Enterprise Java, SQL / Oracle (with plugins) and PHP. Recommended to several client sites.