In the last 24 hours there have been two GLBSE accounts (that I know of) that have been cleared out.
The common theme between them is that both users had GPUMax accounts, with passwords that were either the same (as the GLBSE accounts password) or similar.
I emailed the GPUMax website yesterday (the email in their whois records as there isn't anything on the site) to inform them of this.
Since I've not seen any notice regarding GPUMax I feel that it is my responsibility to bring this to public attention.
If you have a GPUMax account it is highly likely that it's password has somehow been compromised.
If you use the same or a similar password elsewhere (GLBSE, MtGox, Email whatever) please change them now.
If you are a GLBSE user I would encourage you to use two-factor authentication, there have already been over 3 accounts which have been protected by this.
Nefario.