***CAVEAT***: you can't donate yet! It should be ready and on the website within the week, so keep checking back!
Simply go to the Peace Corps website (www.peacecorps.gov) and click on "Donations". That will lead you to a page where you can seach projects by volunteer last name. Or, you can click on "View all Volunteer Projects" on the right side of the page, and that will lead you to a place where you can search for PCPPs by country of service or home state. The page will show how much money is still needed for the project.
So, keep checking! It should be up soon! I will still send out an email the next time I have internet access and I know for sure that it is posted. Happy donating!