I actually loved their server.... It was definently the easiest for installation and use [up in 5 min on a win98 machine]. (If only Moocks CommServer didn't need the JRE!!!).

I've posted on their forums and had to wait a bit, but I got very informed answers, which helped a lot. Obviously the 'free' version of the server won't be taken care of as much as a commercial version will, but that's to be expected.

There are a lot of XMLSocket servers out there, but NowCentral's was the quickest off the starting blocks.... I personally use Colin Moocks though...

If your know Perl, Java, or something like that I've heard you can write your own XMLSocket server... I have no clue how easy/hard that would be though...