And even if there IS a Digg-equivalent in your space you should still have written your piece with a few key linkers in mind in the first place.
Maybe even with their participation… Because if you can sway your key linkers to contribute something, through email or phone interview, they will be far more likely to link to you.
Especially if they already write a blog…
Anyways, YES you should still be begging for links and don’t listen when folks tell you otherwise. On the positive side your link begging efforts will be FAR MORE valuable to you once you’ve written some quality, needful content that resonates with the wonderful people in your market.