I would think the majority of people these days use an adsl router, so amitcp can do the job ok. Back when roadshow was first announced, I would have been interesting perhaps in purchasing it perhaps, although I did already buy miami (far too much money!).
If it was to become open source, then I would contribute to a fund for that though for example. This would guarantee availability for the future, and allow people to improve on it if they desire. Guess that's not possible contractually for you, but just to say where my feelings are.
Seems there are plenty who are interested though, so I hope it goes well.