I think my readers are pretty responsive bunch considering I don't have that many. My stats say I'm getting about 160 visits a day (a good 10-50% come for the helpsite though). Right now I'm just grateful they're still sticking with me despite the fact I had to cut updates, even if it is temporary.
Forums are great for long term readers, tag-boards are great for quickies. It's not that common to have email, but once in a while you do get one.
I haven't gotten any hate-mail yet though.
One thing to keep in mind is, you need to give them an incentive to respond. I think part of getting feedback comes from how you ask for it. Like Jamie mentioned, if it effects them, they will participate.















