OwnCloud is a WebApp that replicates a lot of cloud services (file sync [android and desktop client], contacts, calendar, streaming music, etc.). It's available as FOSS or with commercial licenses.
Looking forward to it maturing. I have the alpha installed on my server but it's obviously still pretty buggy. They way it looks, all it'll take to bring it to Google Reader awesomeness is some CSS editing.
("OwnCloud" is hipster for "web hosting", I guess?)