Dynamic Language Jobs Barometer for 2011-Apr-5

Dynamic Languages Jobs Barometer

Each language has

a light bar for its overall total,
a gray bar for a baseline value from Nov. 15, 2006 (N/A for Javascript and Other)
a medium bar for titles-only search results
a dark bar for listings which overlap any of the other languages.

See Dynamic Language Jobs Map for relative job counts per state (updated approx. every 2 weeks).

Barchart of job listings by language

Update 2008-06-29:

Searches for "ruby" now include "rails"
a new "Other" category has been added that currently includes Erlang, Groovy, Haskell, Lisp, and Lua

A comparative trendline is available at indeed.com (thanks to perrin for the link).