Ask HN: What web-hosted Source Control Service do you use?

Hi,

What source control service do you use?

Does it let you download all of your metadata in case you want to switch to another service or your own Subversion/CVS? I tried Github but it didn't let me download comment metadata, so decided to abandon that.

(I want to support group development for a new site in python/GAE, http://www.appenginecash.com/ )