Xen x86_64 timescale?

I'm hoping the Red Hat Xen gurus can enlighten me. Is there an ETA on an x86_64 xen appearing in rawhide? If/when it appears is it possible to run both i386 and x86_64 VMs on an x86_64 box? I've been through the xen docs and it appears that you can't but I haven't really got my head around it all yet so I may be mistaken. Thanks, Huw -- | Huw Lynes | The Moving Picture Company | | System Administrator | 127 Wardour Street | |.........................| London, W1F 0NL |