On some computers Connetify won't work. A lot of people are complaining about an error 651, that cuts your LAN internet connection when starting the Connectify hotspot.
So far there is no solution to this yet, as far as I can tell.
However, on Windows 7 there is a way to do the same as Connectify manually:
Works like a charm for me, after I put both connections in the same computer network.
Only thing that bugs me: If I connect my laptop to the created hostednetwork, internet is as fast as on my desktop pc. But on the Desire it's kinda slow, while market reaches my desktop speed upon downloading. Just the browser doesn't seem to get the same speed.