Amazon is rebooting all their VM's, Xen has an embargo'd security issue: http://xenbits.xen.org/xsa/ (XSA-108) and it will be public on October 1st.
I wonder what it is, and why it is so serious. Might be a hypervisor exploit, or cross-vm access or something. Probably not the bash bug.
I expect a lot of LET providers will be affected by this.
Anybody with inside info?