[imp] recreating "nags" in DIMP

[Liam Hoekenga]

We used a combination of post login hooks and the horde notification 
system to create a couple of "nags" for our users.. informational popups 
that would appear if they had too many messages in their trash or spam 
folders.  An example of which can be seen here..

     http://www.umich.edu/~liamr/horde/spam-nag.png

Any suggestions on recreating this in DIMP?  I'm not sure how well it'd 
translate to the automatically fading out alert dialogue.  Is there one 
that has to be acknowledged before it's dismissed?

Liam