App dev: Martin Heller has an update on Ruby on Rails IDEs. Those would be Aptana IDE + Rails (nee RadRails), Ruby in Steel and ActiveState Komodo. “The Rails IDE market is continuing to evolve quickly,” Heller explains. Editor’s letter: Jon Williams has moved his New York CTO blog to InfoWorld.com, and three people have joined the Open Sources blog: Zack Urlocker from MySQL, Savio Rodrigues from IBM, and Dave Dargo. Whereas Dargo is a “man of mystery and intrigue,” editor in chief Steve Fox writes, “the most surprising name here is probably Savio’s because he works for a company (IBM) not generally associated with the open-source movement. He is a believer, however, and his traditional software perspective should spark lively discussion.” Bloggers, welcome aboard.The news beat: Oracle’s CFO Safra Catz bares her fangs at rivals IBM, Microsoft and SAP, mocking Microsoft for not delivering a third of the features it promised in the most recent SQL Server iteration. Apple patches Safari for the second time since its release to beta testers. And some Macs go snap-crackle-pop after the Mac OS X 10.4.10 is installed, though one intrepid soul already posted a workaround. Software Development