Please can you consider a screen/window/area/webpage capture module for Xara Xtreme, something with at least some of the functionality of Snagit (since this appears to be the most popular used). It looks like everybody uses one, and it isn't Xara, which means you're obliging customers to look elsewhere for a graphics feature. Some people are even using Corel's one because Xara have nothing!

If you can't incorporate your own - what about doing a deal with one of the leading suppliers, like Snagit, to bundle it with Xtreme?