Hi, I'm new here, but I guess I can say I have a LITTLE bit of experience with Inkscape and graphic apps. I use Inkscape regularly to draw floor plans for flyers in the real estate business. It works great! Anyway, I couldn't find an icon for REA 9 that I could use with RocketDock so I made one a little while ago. The only problem I had was when I exported it, the shadow was cut off slightly. I made the page size fit to the image, which you'd think would include that. Maybe it's because it has a gaussian blur applied to it.. Anyway, it's all fixed now. Here it is (All done in Inkscape):
*Updated so the shadow isn't cut off anymore.*

If you want, you can check out my deviantART page in my signature below.