Create a new working copy by cloning a subtree of an existing working copy?

[Kuno Meyer]

With SVN 1.7, is there a way to create a new working copy by cloning a subtree
of an existing working copy?

For example:
- Already checked out:
   wc1/
   wc1/.svn
   wc1/src
   wc1/data
   wc1/data/bin1

- Desired: a new working copy of just the "data/" subtree:
   wc2/
   wc2/.svn
   wc2/bin1

A reason of doing this could be to improve performance.

Thanks,
Kuno