We have a web wallet on the website, and I
realize that's not quite what your asking.

I've heard talk with the developers that when
the Merchant's Suite is completed we're getting
a new Block Explorer, so maybe your feature
will be included in that new Explorer.

I am sure that the Developers will be reading
this page a little later and will be catching up
on comments and will add their own. I don't
know everything on the technical side.