I do think you moon is a little soft but I also think the red is kinda cool, as a moon shot on its own it wouldn't stand... however make it part of a moody or future type landscape and you could have a winner with a little photoshop magic thrown into the pot.
Having never really attempted the moon myself as I was always very much led to believe to get a keeper you need to be north of 600mm in focal length. however my uncle recently complained he couldn't get a good shot with his canon L series 100-400 on a canon 40d body... of course this must be to do with the fact that he bought canon instead of nikon! so I demonstrated that most people think its dark i better let more light in right?... No! as a starting point shoot at 1/200s iso 100 and f8 and play with your settings from there, always shoot it on a tripod as mentioned and preferably with a shutter release and mirror lock up also as mentioned...always shoot it in raw too and using adobe camera raw increase the image size (its in the menu at the bottom) interpolation i think its called from memory (lets you make a 6mp image 20mp etc..) now you have a larger image the crop will be no problem with no pixelation allowing you to fill the frame with your moon.. now open it in photoshop, duplicate the layer, run it through lucis art if you have it to boost the detail and move the opacity slider until it looks natural, sharpen for output and your done... voilla!
hope this helps.