Lithium has helped several customers with the past integrate custom fonts into their community. Typically they have either used typekit or cufon.
If your company was using and hosting a .EOT file and applying it with css on their .com, lithium could accommodate this so you could apply the custom font via css for the community, but lithium would still need to edit the apache config to allow the file type for .com domains (your community).
Also, doing a quick search lead me to this chart. It looks like SVG is not supported by IE 9 and older or Firefox.
http://caniuse.com/svg-fonts