Ubuntu 11.10 Oneiric Ocelot alpha 2 has been released today. Here's a recap of all the changes in Oneiric since alpha 1.
The Compiz modal dialogs finally landed in Ubuntu 11.10 Oneiric Ocelot today. There was some initial work for this, but the actual modal dialogs Compiz plugin has just been uploaded to Oneiric.
Here's a video demoing the new Compiz modal dialogs (Unity 3D):