Have a look at Erlang. Actually, have a look at functional languages in general as being (mostly) side effect free they often have primitives for parallel proce

Have a look at Erlang. Actually, have a look at functional languages in general as being (mostly) side effect free they often have primitives for parallel processing. Another pretty exciting language you might to look at is F# - presently running under Mono on my macbook. Finally, if you love your python (who doesn't? ;)) - see http://www.parallelpython.com/ http://www.parallelpython.com/ for some interesting work.