Comment 76 for bug 579276

The 2.6.32-29.58 kernel update that recently was pushed out lacks the virtio-net napi patch.
I updated my PPA against the updated kernel.
https://launchpad.net/~nutznboltz/+archive/lucid-virtio-napi

The updated PPA is still compiling; ETA Mar 2, 2011 02:40:00 UTC

To test with my PPA run:
sudo apt-get install python-software-properties
sudo apt-add-repository ppa:nutznboltz/lucid-virtio-napi
sudo apt-get update
sudo apt-get upgrade
sudo reboot