I'm buying Second Life lindens.
I can pay with different systems, including bitcoins.
If you just want to sell the rest of your lindens in your Virwox account, no problem, instant transactions.
If you want to sell larger quantities in your Second Life account, in principle I'll trade only with trusted members. 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 willing to sell big quantities can always contact me, but don't expect great rates and I'll reserve the right to refuse to trade or to request certain measures of security. I have 7 years in Second Life.
If you are someone disappointed with Virwox (you can buy bitcoins with paypal/credit card there) because your linden deposits are being rejected, don't just give up and sell to me; talk with them first, usually they accept to bypass their security system and allow newbies to deposit small quantities if you contact them.