Applyed is a patch that allows you to open a included .tex file by 'Ctrl'-Mouseklick. For any \input and \include command within your TeXlipse enabled project just move the mouse over the resource name klick 'Ctrl' and the left mouse button. a new window is opened with the referenced file. this is the same behaviour you might know from java ide. apply the patch from within project level.
patch
Thank you for the patch. I am moving it to the patches tracker.