ya, maemo.org is flaky. sometimes the server's down, and sometimes those green install buttons just don't work for one reason or another.

Whenever a green install button doesn't work for me, I follow the "Homepage" link (under the "Links" heading) to the project's garage page, where you can often download the deb directly with microb (bypassing the repository/catalog mess) and then use app manager to install directly from the deb.