Someone somewhere should make a Web 2.0-ish collaboration site where people can do math together. Maybe like an IM service meshed with LaTeX capabilities, but without the coding hassle. Point-and-click type stuff. And an ability to save the notes and do projects together. Oh, and some basic graphing capabilities. And the ability to export the LaTeX code, and import and share MATLAB, Mathematica, (etc.) code.
Oh, and the ability to NAVIGATE THE FOLDS OF SPACETIME AT YOUR WILL.