I thought I responded to this last night but I guess I didnt.
I also purchased Linden $$ last night and the transaction went thru paypal and my bank, but Linden Labs have the transaction as showing system_cancel. I submitted a ticket and no response as yet
It was for about $50 aud, I will give them another 24 hours and then file a dispute with paypal and let them deal with it
Did you get yours resolved as yet? I am interested to know
Cheers