Does anyone have decent posters that include that hearty little guy?
I found so far only (yes, 2 of those are wallpaper format -.-):
http://s460.photobucket.com/albums/qq326/DELTA_1551/bbrd4.jpg
http://s460.photobucket.com/albums/qq326/DELTA_1551/bbrd3.jpg
http://i545.photobucket.com/albums/hh371/Eufeion/Fallout3-NukaColaPoster.jpg
http://s460.photobucket.com/albums/qq326/DELTA_1551/bbrd1.jpg

I checked the shops, but there arent any posters for sale?

Do you mean like for a wall?
if so i think you can go to this site http://www.posterdog.com/ and make one?
ive never used it just heard of it

Would there not be possible problems over copyright on the vault boy images?

Copyright issues may occur, but I think if it's for personal use just cause you're a fan it shouldn't be a problem. If you put it up and claim that its your own, or use it as advertisemant, then thats a whole different story. Don't know for sure though.

I only mentioned it because some places in the UK make you sign a document stating that you either own the image or that the image concerned is in the public domain, before any printing would be carried out.

I wondered if the same terms and conditions applied in the USA.