I like a wiki to contain information that needs to be known within a team. Having the expression in mind, "A picture is worth a thousand words", I would like to make a small class diagram, sequence diagram or component diagram inside a wiki using an ajax or flash plugin.
We currently don't do any technical design because they are often lost in some program or out dated. Being able to put these in a wiki (and update them there) would make them useful again.
Do you know of any wiki's that have that functionality?