If you want to find out more about what JDT has done for the Helios release, you might want to come to the following events at Eclipsecon 2010.
1) What's new in JDT? (lightning talk)
2) JDT Fundamentals (2h tutorial)
Of course I will be available for questions, discussions or comments during the whole conference. Send me a message if you want to meet there.
Thanks and see you soon at Eclipsecon.