We have just went live with a new build of the Component Development Tool Plug-iin for Eclipse. This fixes the missing dependeny problem enountered by some folks during install. It also completelty removes the dependency on WTP. It works in Eclipse 3.4 and 3.5.
p.s. Don't forget that once you use the wizard to create a new Component you can select the component.xml to see all the GUI options for managing the services, operations, run time settings etc of your new Component. That's the cool part