Great program, but...
Mouse clicks directed at the text do not pass through to the window below, as would be desirable in most cases.
Even with that limitation, however, this method of message display is almost infinitely less offensive than "pop up" windows which steal the keyboard focus and force you to acknowledge them before they disappear.
Pretty cool concept.
I set up a little alert script that I use to
display new log entries onto the scren.
tail -f /var/log/messages | osd_cat -b -o 50 -c
An open, cross-platform journaling program.
A scientific plotting package.