Probably when someone who knows anything at all about modding cables and writing drivers comes along...
WHat we'd need would be (and I state at this stage that I couldn't do it):
1) An adapter for EXT --> Serial or EXT --> USB; preferably the latter since serial ports are rapidly being excluded from motherboards atm. But it'd have to be relatively simple either to make, or to come across, or there'd be no GP users online to play against anyway.
2) A set of drivers to let the computer know what on earth it had just had forcibly inserted into its socket, thus stopping it from panicking and going into digital denial of any device there.
3) A GP32 emulator that would be compatible with the driver written (or possibly contain it), and would register as all the other gp32s on GPNet (anyone got any better ideas?) to any non-modded GP32 - we wouldn't want to mod the thing itself since no-one would want to risk ripping theirs apart to try the same thing. This is also a bonus to using the RF module over and above a USB cable connection - no need to write GP-based drivers; just a normal multiplayer Lib.
The 2nd and 3rd things could possibly be dumped under the same thing, but that's what I can see us needing. Or something along those lines.
As I said, I'm shite at electronics (just about handle a soldering iron without melting something

) and even worse at programing (vis a vis - I can't) so I wouldn't be able to do it. Still - the roadmap's there for anyone to follow. Or any alternative ones, of course...
Another idea, BTW, would be to have the emu able to act as a relay station - i.e. have one machine connected to the Net, and then relay the signal from outside the range of the RF unit to other units strategically placed about everyone's houses; basically a very slow PC network at the same time (somewhat less than Serial).
If there's any USB network devices around that use the same frequency as the RF unit, they might be worth looking into, too. They'll probably have more range than your standard thing.
We could, of course, ask Gamepark if they'd produce a stand-alone RF unit to make this sort of thing more feasible, but I doubt they would.