hmm background is pretty cool, though it looks almost totally separate from the render. brushes look good, and provide the depth you need to merge the two (foreground and bg), which makes it look not bad. the lighting is fairly well done, though i would have exaggerated it a bit more. text could definetly use work, but is still small enough not to distract from the focal too much.
I like the background of this sig a lot, the text gives it a really cool look. The line brushes look very nice, but I don't think the stars or weird "Asteroids"-looking shapes quite fit. I like the colorization in this sig, it really draws the focal and the background together very well. I think your text placement and font choice is great, normally I don't like rotated text, but in this instance I think it really works nicely. As Kninja said, the lighting is well done. The border is nice as well. Overall, great job.
or the same ones, i can see where he is coming from; it kind of bugged me at first how you could see through the brushes. im not sure what would look better, though
Yeah the white in the brushes was overpowering so I toned it down. I could try some with a light blue or something.
light blue might look nice i agree.. i always find it fun to take colour samples from the sig itself so that you get a really nice colour scheme going