Just a clarification: Three Weeks for Dreamwidth isn't about severing from LJ, and it's not required that you don't crosspost your entries.
Three Weeks for Dreamwidth is about creating content on Dreamwidth and only on Dreamwidth to draw people here. Some people (myself included) have chosen to do this by not crossposting our usual posts. This isn't mandatory to participate (not that participation itself is mandatory). It's just one way of creating content here as opposed to other places (which is a complaint for a lot of people, and the reason they don't wish to move to Dreamwidth).
Other ways people are participating are by creating content here (a lot of fannish content, for example) and not posting it elsewhere until three weeks are up - that way people have to come to Dreamwidth to see it.
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Date: 2010-04-28 07:10 pm (UTC)Three Weeks for Dreamwidth is about creating content on Dreamwidth and only on Dreamwidth to draw people here. Some people (myself included) have chosen to do this by not crossposting our usual posts. This isn't mandatory to participate (not that participation itself is mandatory). It's just one way of creating content here as opposed to other places (which is a complaint for a lot of people, and the reason they don't wish to move to Dreamwidth).
Other ways people are participating are by creating content here (a lot of fannish content, for example) and not posting it elsewhere until three weeks are up - that way people have to come to Dreamwidth to see it.
There's more information about it in this post, this post, and this post.