They have ways of detecting "mutual-clicking" and if it happens too much you just look like someone who has made a bunch of alternative accounts for yourself, just so you know. I won't promise diggs on your submissions, but send me a PM with your digg username and I'll add you to my "friends".
The offer is open to anyone else on the forum as well. It'd be nice to have some more web-dev "friends" to help me sort the good stuff out.