Ooops, almost forgotten about this. Will have to come to a decision quite soon I guess. I've been very impressed with BL21DE3's contributions and I'm sure they have taken a fair bit of time but unfortunately they are all of them far too big to be considered - I think I stipulated a max height of 100 pixels. If that seems harsh, consider that the logo appears on every page and is essentially "wasted" space below which comes the forum proper so a 200+ pixel height banner would start to get pretty annoying.
Whilst I'm sure that it would be possible to make the logo "active" with clickable links for the forums etc that would be way outside of the vBulletin template norms which is not something I really want to get into (not to mention that it would be very time consuming to setup).
Michael.