I like the concept of boards, although in it's current state of development, it's just a toy. If it were improved on so that it could use eternal symbol libraries, such as flow chart symbols, or engineering symbol sets, it might be a useful collaboration tool. I wouldn't replace it... I'd improve it.

I don't think webmasters will need to worry about training people on wave basics. you can bet that Google will spend a lot of time and money in that area.