Anybody see a problem with this idea?

I want to install a few MU networks on
the same domain.

domain.com/network1
domain.com/network2
domain.com/network3

using subdirectory intall...
creating base site with the URL's

domain.com/network1/blogsitename
domain.com/network2/blogsitename
domain.com/network3/blogsitename

And...

Using the WPMU domain mapping plugin
on each network.