Foswiki is a fork of the TWiki software. If you want to know why the fork was created, read this. It was in our best interest to switch because the development community that worked on TWiki moved to Foswiki. Plus we needed to update our software in order to receive future benefits (including the WYSIWYG editor).
Someone asked at the presentation if the LaTeX plug-in worked for LaTeX markup in general or just math mode. With some limitations, the plug-in allows general markup. See LatexModePlugin for details.