This is an excellent idea. The Donations section of Linux MCE is directed at CD/DVD purchase. I haven't used a CD/DVD in a long time (lol), but would be willing to directly donate into a kitty to help with project development, say, via PayPal.
LinuxMCE is the most fun hobby I have ever had! (Although I do enjoy skiing and diving, world traveling, vascular surgery, moviemaking, and corporate mergers!)
I do not think the intent of mentioning Miro was to indicate what it does.
I think the previous poster was alluding more to how Miro makes pushing donations to them easy so people are more apt to provide dollars to help fund hardware/development.