Yeah, this stuff is totally doable in the buzz xaml.
To just display the connection info in a tool-tip; Amp/Pan/Channel/Destination info is reachable in buzzgui.common/connection.
Anyways.. after taking a look @ the interfaces using Reflector :
For making the wires appear or not on mouse over.. it'd require multiple datatriggers, one for the mouse over and then a few for the wirestyles, but it seems like it should be possible. There's a Destination.Machine.IsWireless bool to detect if the connection is wireless (which you would need to seperate from the normal connections).. so yeah, looks do-able. Not sure off the top of my head how you'd isolate just the one you are hovered over, or if its possible..(no if statements in XAML), but you could at least show all wireless connections on hover over and then give the wire style something unique looking.
I need to look into this stuff anyways so I can update my personal theme.. I haven't touched it (other than some bug fixes after updates) since he added the wireless machines stuff so mine is missing those blocks. I didn't even know they were there on the normal theme until I read this thread. If I come up with something, I'll share some bits... but that shouldn't keep anyone from looking themselves because I dunno when I'll get around to it.