eLinguistics.net will publish step by step timeline maps of the evolution of languages. As a first beta edition you can see the timeline for the Indo-European languages as well as for the Afroasiatic languages, as inferred on the basis of the eLinguistics data.
 

Indo-European evolution timeline:

You can also download this timeline as pdf - IE evolution timeline PDF format or refer only to it at: Indo-European language tree  
 
 

Afroasiatic evolution timeline:

You can also download this timeline as pdf - Afroasiatic evolution timeline PDF format