I just found out about the open source beta for Linux/Mac that's coming at the end of the year (hopefully), and I would dearly love to see support for .ogg, .ogv, and webm codecs. Given that the Lightworks tool is becoming open source, it would be silly to ship without these codecs included.
If the development team reads these forums, PLEASE add support for these codecs - this is a huge part of my daily workflow and would greatly speed things up for me.