Have not tried this yet, but had it bookmarked to share, the TruLink Wireless USB to VGA will send video signals 30 feet. Not far, but far enough for an instructor machine to connect to a projector, or maybe from a PC in a closet to a monitor used for photos or welcoming guest announcements. At $120 it’s not horribly priced, and might seem like a bargain if it saves you buying and running a 30’ VGA cable to something.
I'm Andy Warren, currently a SQL Server trainer with End to End Training. Over the past few years I've been a developer, DBA, and IT Director. I was one of the original founders of SQLServerCentral.com and helped grow that community from zero to about 300k members before deciding to move on to other ventures.