[selcouth]

Re 5:

We did this on our new startup, and had a few complaints we are dealing with now. Just to make sure you avoid them:

1) if you redirect them to a signup page, make it SUPER CLEAR that their post/content wasn't deleted, that it is being stored until they register.

2) give them an alert as they are writing that they will need to be logged in to actually add it.

We had users complain that it wasn't clear that logging in would add their post, that they were afraid all that work had been deleted and it made them not want to continue. That wasn't the case, so we just had to add a little note, but still.

(We're also working now on just a lil ajax box that floats up above the post asking you to login, so you can see that your post is still there...)