The topic says it all. How can i create a portlet with static
content for every user (with a welcome message, first steps in the
system). It does not seem to be possible to do it via the UI. But
what do i have to achieve that via the API?
This is a problem Sloan faced before launch. In sum, you can't, at least not elegantly. Caroline Meeks wrote/forced a custom portlet for all users, but it is not any condition to be distributed as new code. But this is defintely something I would like to see put back into .LRN - it was functioanlity I had with our first version of SloanSpace, although I don't think it was all that pretty under the hood.