to run a rsh remote command

hi all
I am trying to get a list of machines and send them commands to run ,
but I dont want them to bje done one after the other < i want them to
run them in parallel from a script >

What I am doing is

foreach i (`cat q`)
rsh $i -n <some command >
end

Now I want the job to be taken by the machine 1 and we should not wait
for the machine to finish and return for us to iterate