1 step automatic registration that includes registration in 2 forums/domains.

[adpar]

Is it possible to have 1 sign up form,

that registers a member in 2 forums simultaniously ?

we have 2 forums in 2 different domains and we d like the users that register on one of them
to have the option to automatically register an account with the same name in the other forum too.

1 step automatic registration that includes registration in 2 forums/domains.