Ent Gaming has been the door to wc3 games for a while now and I can't remember a time when I didn't open wc3 and ENT was on my browser (actually I do but kinda proving a point here
)Wc3 is dying and we all know it, but in Ent's case it goes to your favor.
A great percentage of wc3 players knows that to reach out for the few that are playing we'd have to go through Ent first ,so I suggest you guys use that to get bigger and better.
A clan system would be a good start ,a lot of players would be active on the website and you'll be getting more income from advertisements which will help build a team of programmers (assuming there are no programmers in your team or any that would offer to help at their own time for free).
Then start working on a client that would work side by side with wc3 :improving the chat system is a good start ,the clan thing would be very useful too,
a built in proxy like the one you guys suggest at your wiki and many other ideas that I can't think of right now but you get the idea .
I know you guys are a non profit organization but think of it as a way to help resurrect wc3 and improve the quality of it's gameplay .
