I would not donate money because I decided for Pixelpost as a free application.
I wrote some addons and try to help in the forum, the time I spend for that is my part of donation and I really like to do that.
If there is anything I can help you with, IE page design, template design, logos, scripting, testing, writing Wiki articles, translating english into german or whatever, feel free to ask.
But no money, sorry.
This is my humble opinion :-)