Acording to TODO file and http://groups.google.com/group/redis-db/browse_thread/thread/e766d84eb375cd41 implemented msadd.
It's my first contribution to the project, so let me know if there is anything I did wrong or can improve on the future!
Added MSADD command
Added set test
Added todo on unit test
+1 awesome, looking forward to testing this; it will come very handy for many of our Redis use cases.
Fixed by multi args as of Redis 2.4+