I messaged over xbox live but got no reply?
I'm not on every day, primarily because I have work (I'm on a break at work right now) and other real world obligations (and I play other games as well) but I do try to be on at the very least weekly, especially now that Morrowind is out (and it's amaaazing). Suffice to say, a response and invite is on its way later today, unless you'd like to ask a guild officer who might be able to get back to you sooner.