Good news to all Windows Phone 7 users, soon! you will be getting the ability to take screenshots on your WP phone. No, it's not official, but a homebrew app, courtsey Julian Schapman.
"Using the Windows Phone Device Manager, developed by Schapman, in conjunction with his app 'TouchXperience' one is reportedly presented with the ability to take screenshots on their device. Requiring the form of multitasking, this is a fantastic feature to bring to the homebrew table. The guys at Smartphone France proved their word by taking a bunch of screenshots on their LG Optimus 7."
WPCentral reports that the developer is planning on releasing the Windows Phone Device Manager and TouchXperience for WP7 "soon" and is still undergoing testing with private testers (only donators are eligible for enrolment).
Smartphone France have used the application, and even provided screenshots which prove it's legitimacy.
[Source: Smartphone France]