Be aware though that digg doesn't like spam. Or to put it more accurately, they'll report you, block you and get really really ****y with you.
Anything you do submit has to be a good site or article, and it has to be an original. Little sitse will be ignored and fade out, and using your site to link to another on the web will also get you flamed (bloggers do this a lot).
And don't use signature adverts, they hate that too.
Also be aware that 10000s of people read dig, your site has to be ready for it.
Apart from all that, yeah digg has a wide geek audience and should be considered if you have something to offer
