Just done some experimentation with USB tablet in Fedora 11 guests. It turns out we were just one tiny step away from it working correctly. Indeed, same applies for F10 and we didn't realize :-(
In the guest, edit the HAL file
/usr/share/hal/fdi/policy/10osvendor/10-x11-input.fdi
just adding
<match key="input.product" contains="QEMU USB Tablet"> <merge key="input.x11_driver" type="string">evdev</merge> </match>
Now shutdown the guest, and use virsh edit to add
<input type='tablet' bus='usb'/>
Now start the guest.
The USB tablet will automatically configure and provide 1-for-1 mouse motion tracking with no pointer grab required
Added 2 bugs to track this work so we get it done for F11 beta
HAL https://bugzilla.redhat.com/show_bug.cgi?id=487025 virtinst https://bugzilla.redhat.com/show_bug.cgi?id=487028
You can try out the FDI change just fine on F10 if you're so inclined
Regards, Daniel