Just released, an updated version of the Welcome module. Several user submitted enhancements were included in this release.

Here are the details:

1.1.0 - Feb/2008

    * Added token help
    * Added content version
    * Added keep hidden checkbox and keep hidden message
    * Added close button and close message
    * Added standard DNN token replacement
    * Added custom token replacements
          o [Views] - # of views so far
          o [ViewsRemaining] - # of views before module hides itself

Full documentation can be found on the wiki.