So, this is only the second signature I've made, and i would appreciate suggestions, or just opinions on it if you could. Thanks. The link is to the base image that i used to make it. http://www4.wave.co.nz/~djhuseo/interface/desktops/music/finals/MU-green-eye.jpg

 

That's some very good blending. At first, you can't tell that there's a girl in the middle of the iris and it takes a while for the eye to catch on. It looks like there's another person on the left...but it's hard to distinguish. What program are you using? Did you use layer modes to blend the images? It also looks like you used a swirly texture, but I could be mistakes and it was just the curves/levels feature of your program.

Your text is a bit pixelated at the top but it fades nicely into the background.
Nice border, though it stands out a bit too much, try lowering the opacity of it. In fact, this banner/siggy could do without a border. However, it's very well blended.

Awesome.