The ubergrom UART is nothing new, just underutilized IMHO.
The UART can be connected to either a wired connection or a wireless (wifi) connection, provided the two devices are linked with the right signal levels. My ubergrom is connected to a PC DB9 serial port so that I can use either TCPSER (for BBS connections) or the HDX server (to transfer files).
A wifi device is great but as Greg points out, the best known device is currently unavailable. I suppose there are other wifi modems that could be explored.
1) TIMXT (yeah that's a no brainer)
From what I understand something like this could be available within a year.
TIMXT works just fine with the ubergrom UART. You may have missed that thread. There are a few testers and if they want to share, I have no problems with that. The test copy is hard-coded to one baud rate and only works with the ubergrom UART. When real life moves out of the way, I'll release the version with UART/baud rate selection and PETSCII/ANSI support.