I've been recently brainstorming this. The scenario is I have friends who used to have a regular tabletop gaming sessions(D&D), but now a few of us have moved away. So what we have now is the core group getting together and a couple of 'remote' players. The challenge is to integrate the remote players *without* disturbing the existing style of play(and must be cheap!)
The existing style of play is usually a grid-mat with dry-erase markers to draw on, and miniatures.
We are going to setup voicechat and multi-person vidconference, but I was looking for something that would allow the sharing of what was being drawn on the mat to the remote players (again, cheaply!) so the expensive whiteboards, even the cheap $500, is too costly.
The best I can come up with is one of the cheaper digitial pens, perhaps, that provide an absolute 2D position. Something that could be used to draw, and maybe also mark the positions of the miniatures as they are moved around. Probably place a PC monitor at the edge of the table to show the electronic representation, and for others to see when the remote players manipulate things the electronic representation.
The rest is gravy, like maybe automating some things like die rolls or the such, but most of that stuff works pretty good as is. The last thing we want is to be diginv through a bunch of clunky menus/etc.
So cheap and integrates well with the existing physical interfaces that enables remote participants to an existing physical group is the goal.