See this post I just made....
http://forum.bitcoin.org/index.php?topic=17757.msg234282#msg234282.... with the crap graphics.
That's a free letter that implies BT and can be freely claimed without pissing anyone off. Using that in a logo without the downmarket pawnbroker gold/yellow theme and we're onto a winner IMO. Whatever the end result, a rebranding is necessary.
Great, clean graphics work within the obvious limitations btw!

I'm thinking that instead of going for an ASCII symbol the default written form should be 'btC.' Simple, explanatory, no need for weird characters.
Planning to execute some identity designs based on 'btC' in the near future.