This is a very simple Widget that displays the last few lines from a file like /var/log/syslog without wasting resources (see below).

The number of lines, filename, width can easily be changed in logtail.py (no menu, sorry).
Update interval, font size, font type, etc. should be set in logtail.theme.

I know there are a dozen widgets available that state to do the same, but all those I tried were a pain to configure and/or relied on things like 'cat syslog | tail -f | ...' every 2 seconds. This widget mimics tail -f logic using python.

(requires SuperKaramba, I guess)