I upgraded to Mountain Lion and lost Front Row. I depend on front row to watch my media files. What options do I have?

Not a lot. Front Row is incompatible with Lion and Mountain Lion and has been withdrawn by Apple.

Try Plex http://www.plexapp.com

I use it and find it to be much better than Front Row.

It's a real shame they decided to drop Front Row in Lion and ML, especially if you were using it to play iTunes medis on an iMac or laptop rather than a TV.

If you were connecting to a TV, then for iTunes purchased content you consider an AppleTV device.

I've held off updating my Mac Mini as i want Front Row on it, but to be honest rarely use it.

The problem with AppleTV is more limited format support.

In addition to Plex (which I have on the Mini and irritates me because I cannot stop it launching the server on startup), consider XBMC:

http://xbmc.org/about/

AC

Tried XBMC ... not a fan of it either. The beauty of Front Row can not be duplicated so simply.