Stu,
OK, thanks, sorry I missed that in the manual. I'd like to drive the steel gauges so they update every few seconds, so i have a web page that works a bit like the weather cat client... almost real time. This would require a mechanism to write out the data to a file very few seconds. The long poll / ajax option in the steel gauges then updates the web page as soon as the data file is updated.
I really like weather cat, so please keep at it!