I'm a 3D Modeler, and I have 10 months of experience in the 3d world.
I also have roughly 3 years of experience in the 2d graphic design industry. I am a self trained freelancer, and I enjoy doing such things as this. If fact I designed my own logo, seen in my profile picture in only about a half an hour.
If you have a rough sketch, or a basic idea of what you want, I can work off of that... Otherwise, I can start from scratch. Also, if you have some colors you'd like used, I can work with that also....
If you have no ideas whatsoever, I can provide you with rough sketches until you see what you want. Also, if you don't know what colors to use, I would recommend the following:
*red = because it is a stimulating/energetic color
*yellow = because it is a warm/inviting/friendly color.
*green = because it makes one want to spend, and reminds one of money.
Now if you're doing more of an antique shop, or a country shop, I would go with cream.... And some buttons perhaps? Also an old fashioned looking teddy bear will always add to yours scene.
And for your formats, I can do png, jpeg, gif, psd, and perhaps bmp and pdf.
I can also do any resolution you want. And make the image any size you want.
Cheers,
~Joey