UltraViolet http://t.co/e02LiYLVDk has an interesting model of users proving they own a copy, then letting them stream from anywhere.
miniblog.
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Turns out that a fresh Arch Linux install is significantly easier than letting a 2-year-old system install 3.6GiB of packages and hoping.
Crowd-sourced creation really benefits from letting users claim the glory. A user may show off SO rep, but there's no Wikipedia equivalent.