This is a great and quite useful look at Eclipse and its promising future on the Mac. The more choices we have, the better.
First, an open question to Philippe as well as other readers: are there any equivalent efforts—either inside the Eclipse community or elsewhere in the larger Java and Mac communities—that is attempting the same thing regarding Cocoa instead of Carbon? Due to their OO similarities and equal status on the Mac platform there has to be some way of marrying Java and Cocoa beyond what is available today in order to move beyond the Cocoa vs. Java choice for Mac developers. If we could transcend that dichotomy through some sort of open-standards integration of Cocoa and Java development, that old dichotomy would be rightly seen as a false dilemma and Mac developers could develop true multi-platform apps that would also satisfy the most ardent Mac Cocoa purists. Am I just dreaming or is this possible?

Second, how does Eclipse compare to Borland's JBuilder for the Mac (beyond the obvious significant price difference)?
Any opinions are welcome. Thanks!