I can pay with different systems, including bitcoins, but don't expect great rates and, in principle, I'll trade only with trusted traders from the Forum. The risk of fraud and Linden Lab intervention reversing the lindens payment is always high (see, for instance:
https://bitcointalk.org/index.php?topic=122417.0). Recent forum members will have to wait exactly 72h to receive the bitcoins (I'll post here in this thread immediately that I received the lindens). I can accept small quantities if higher than 1000 lindens. Actually, for first costumers I only accept small quantities. I'm starting here, but I have 7 years in Second Life.