Why exactly do we have these "interwiki" links that go to projects
with no connection to WikiMedia? Why not just use templates:
{{youtube|foo}} (which might expand to
[
http://www.youtube.com/watch?v={{{1}}}|{{{1}}} at
YouTube.com]
rather than
[[YouTube:foo]]
for instance.
Why is it preferable that they be in the software itself?
Steve