Very interesting with the Custom VJ application! I've always thought that it would be cool to have my DJ program (Traktor) be able to send this type of info to M8. Unfortunately, I think it would be hard to get that kind of info out of Traktor. Maybe in the future. However, it's cool to hear that you're doing it!
As far as the Texting thing. I know there are some apps out there, and I'm sure it can be done with Modul8, but it's just never been something that I've really been into. Personal preference I guess, but as a DJ, I want people to dance, not text! In any case, I think you would definitely have a market out there for that type of module if you were so inclined.
On the DMX deal, I've really got to look into Max/MSP. It's one of those things that I have a passing familiarity with, but I've never taken the time to really look into it and learn it. I'm sure if I did, I could figure out some pretty cool stuff to do with it. However, I'm especially interested in your DMX hookup because I've been looking for a Mac based DMX program for years (I know there's LanBox, but that has never really done it for me). I wonder if it would be hard to do what I need in Max?
Also, I'm intrigued by your PNG module. What I would like to do (that's remotely related, I guess) is find a way to do a slide show module where I can basically download my digital camera, preview the pics, and do a really quick slide show. The thing is, it would have to be pretty quick since I would normally be doing this on the same machine that I'm DJing on (so maybe 1-2 minutes) to run a digital sign. I guess I need to add "learn Python" to my list of things to do...
In any case, I appreciate your input! It's really interesting to hear what people are doing with Modul8. Pretty off topic though!
Oh and here's a link in return for your link: http://www.midwestdjs.com/dj-photos/gallery/show/155
You can't see a ton of the video screens, but you get the idea...