Yup, I concer, but to be clear, not all ToJ members play UT2004 exclusively. There are some members who still have classic UT installed who might be up for a game. I myself play U2XMP every once in awhile (I think I'm the only one).
And no, you wouldn't be able to play UT2004 with your original UT game (I assume by "original" you mean, classic, 1999 Unreal Tournament). And unfortunately the UT2004 demo won't connect to full retail UT2004 servers, which is what our current server is.