We've been working on Collusion for a while now, which might do what you're talking about: shared collaborative white boarding (with a really big space - from a URL, ... with pen support, good for tablets, phones etc.…
We've been working on Collusion for a while now, which might do what you're talking about: shared collaborative white boarding (with a really big space - from a URL, ... with pen support, good for tablets, phones etc.…