Google. Period.
This is really strange.
When I look for “asp.net” in google, I get back only one (!!) result: ww.asp.net.
When I look for “vb.net” in google, I also get only one site, which has nothing to do with vb.net.
Of course, when I look for “asp net” or “vb net” I get tens of millions of results.
I think it's time someone in google will hanlde the period thingy.