Wow, this app is really great, and has made some impressive strides. I just had some fun rearranging my home screen (a note: though the app allows you to drag to the bottom row, leaving other places empty, this didn't work for me, it just put what I had placed in the 4th row into the 3rd).
The thing I'd have to say I'm most happy about is that I can now pleasantly forget that I'm using AT&T's network at all. I'm using Apple's network
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Here's the link to the three icons (I made a black one first before I decided I liked matching the blue better), if anyone would like to use them, feel free. Liberating you from AT&T in this small way, I feel like Robin Hood really.
EDIT: I updated the photos to move the image up just a bit, and made the blue logo gradient so it matches both the signal indicator and the wifi signal indicator pretty darn well. I haven't tested it with the Edge logo yet, so a bit more tweaking may be required, but I hope not. Try them out, I think you'll be pleased with how they blend in.
EDIT2: Ok, so the perfectionist in me wanted the Logo centered between the signal indicators, so after what seems like 20 attempts (poor little phone), I believe I've fixed these. I'm going to bed now.