CodeGear has published on http://dn.codegear.com/article/39131 the third of my series of white papers introducing Delphi 2009 and extracted from my book Delphi 2009 Handbook (available in printed form from lulu.com). Titled "a Tour of Delphi 2009" the white papers covers the updated build configuration managements (including options set files) and the new resource files generation and managements, plus a few other new features of the IDE in Delphi 2009 (compared to Delphi 2007).

If you are interested in new features of Delphi 2009 comapred to (say) Delphi 7, you can find all of the information in my Delphi 2007 Handbook, instead.