I figured these two items might prove useful to a few here...
First up is an image background removal service (they do offer other image manipulation services). Rates start at $0.49 for simple images and go up to $6.99 for some fairly complex images... custom rates available for ultra-complex stuff (think full head of hair blowing in the wind). They even offer a free trial:
http://www.clippingpathspecialist.com/
Second is an open-source program that enlarges images. I have not spent any time with it yet, but the image quality looks decent enough to be usable:
http://sourceforge.net/projects/imageenlarger/
Enjoy!