July 2015: It
turns out that LSA publishes
an annual report, which also tracks gender ratios. If everything works
out right, there might soon be some information on gender ratios in Language
publications and submission/acceptance rates for the LSA annual meeting.
See also: "How Did (American) Women Linguists Become Women in Linguistics?", by Margaret Thomas, Boston College: Slides & Text
September 23, 2012: I have finally added the information on the International Journal of American Linguistics that Keren Rice sent me half a year ago
There's also some pretty old data for the less prestigious Journal of Linguistics (created January 29, 2006), which I hope to update soon.
if you can't read French, here are the statistics for December 31, 2000:
In my lab, UMR 7023 (March 1, 2012):
*Acknowledgments: The list of people who helped me with numbers and ideas has now become to big for me to keep track of it, but I can't thank everybody enough for suggestions and information.
To be continued...