My vote is for the Thai Baht. It's clean, elegant and standard.
This isn't a vote; B⃦ has been the standard symbol since the beginning, and there is no good reason to change that. This is just Atlas trying to turn Bitcoin into mere "Silk Road currency".
Except not every implementation of Unicode displays whatever symbol that is.
In Firefox 15 on OS X Leopard I see the letter B followed by "20E6" for a Unicode symbol that won't display (
Combining Double Vertical Stroke Overlay). In Emacs I see B followed by a different symbol (Both Firefox and Emacs are configured to use UTF-8 on my system).
The problem is that you've opted for a UTF-16 character instead of a UTF-8 character. UTF-8 is far more common and accessible. This is why, like shamoons, I argued in favour of using the Thai Baht symbol last year.
The only argument against using ฿ is that it is used for THB aleady. On the other hand $ is already used for USD, CAD, AUD and NZD. While ¥ is used for Yen and Yuan. Currencies sharing symbols is nothing new, that's why we have three letter codes for them as well.
Once again, I don't see any problem with using the baht symbol for Bitcoin and it has the added advantage of displaying correctly on a wide range of systems.
This was debated in detail
last year and my post in that thread (which included a couple of other suggestions in addition the the baht) is
here. My opinion in my first paragraph hasn't changed: I think that the symbol ought to be an existing UTF-8 symbol so that it can be readily used on most systems or browsers and not require additional fonts to be installed.
BTW, there's a poll in that thread from last year which was resoundingly in favour of using the baht symbol.