Yes, we are pleased to announce this feature -- it is only in the very latest daily builds, I believe dated Sept 14 and newer.

<http://www.cgl.ucsf.edu/chimera/download.html#daily>

 You will need to get Modeller separately from the Sali website, but once it is installed you will be able to run it from Chimera.  Here's the documentation, which is also included with the build:

<http://www.cgl.ucsf.edu/chimera/docs/ContributedSoftware/multalignviewer/multalignviewer.html#modeller>

<http://www.cgl.ucsf.edu/chimera/docs/ContributedSoftware/multalignviewer/modeller.html>

Best

Elaine