Two recent calls for papers in evolutionary Linguistics:
Conference in Evolutionary Linguistics 2012. November 9th-11th, 2012, Peking University. Submission deadline: September 1st.
The keynote speakers include Prof. William S.-Y. Wang, William Labov and Morten Christiansen.
Session on Origin of language and human cognition at the International Congress of Linguistics. July 22nd-27th, Geneva. Submission deadline: September 1st.
I found out about these through MusiCoLinguistics. Confusingly, some publicised calls for the Peking University conference link to the conference in Geneva.