This made me stop and pause and think maybe think livejournalers were just unusually mean, because I have my lj feed going to my twitter and none of my twitter friends seem to mind. In fact, some of them have commented on or re-tweeted my blog entries, which is a nice thumbs-up to what I'm doing. On the other hand, the "tweets for today"-style posts I see on lj rarely generate comments, which is part of the original reason I decided not to use loudtwitter.
So do the user bases just have totally different definitions of what's cool and what's annoying?
No. Because interestingly enough, over-use of twitterfeed (the service used to automatically update your twitter with lj entries) is also discouraged on twitter. Unless you're CSPAN or NASA and people are already interested in you because of who you are, twitterfeed can give your followers a feeling that you're not terribly interested in twitter, you're just using it to get hits and promote yourself. In order to show that you're interested you have to stay engaged in the twitter conversation... reply to people, retweet others, type the requisite 140-character philosophical thoughts tweeple have grown to love. Only after you've done that groundwork is it considered polite to twitterfeed. Twitterfeed is a way of saying, "Hey followers, I love you guys, bu here's something I had to say that I couldn't fit in the tiny box." You have to back up the "love you guys" with other, cooler tweets.
The average livejournal, unlike the average twitter, gets 1-2 updates a day. So if you're using your one-update-a-day to package up your tweets, you're basically doing something that even people on twitter also hate... calling it in. You know, sitting at home not wanting to get up and really be engaged with the community. Sitting in your office listening to the teleconference + your radio show while everyone else is sweating it out in the conference room, unable or unwilling to run to distractions. Sending a cardboard cutout of yourself to cousin liz's wedding and expecting to still find a tulle-wrapped bag of M&Ms at your seat later.
Twitter doesn't have some brand-new set of rules or totally new user community. The whole internet is run by people, and people's expectations don't fundamentally change across years or protocols. When you join a website and tell people you want to connect, you should follow through and act like you meant it. If you want people on livejournal, facebook, twitter, myspace, digg, flickr, yahoo, blogger and wordpress to love you, you're going to have to put a unique kind of effort into each of those sites. Otherwise they'll know you're not in it for them.