Hey Brett,
Your desktop inspired me to get tinkering with GeekTool. First off, I created a repo on GitHub https://github.com/dave-tuc... with an adapted weather icon/forecast/summary that runs from the Forecast.io (Dark Sky) API. I'll be pushing more geeklets here when get some more tinker time ;)
Secondly I tried out your Sidecar skin for Simplify but it's doesn't work with the OSX Yosemite beta...
https://www.dropbox.com/s/f...
It's only showing the top half :S
Finally, which fonts are you using for date/time/weather?
-- Dave
Yeah, I've been using Dark Sky locally, too. I'll need to update that script entirely as the API it uses is soon to be deprecated/sunset.
I haven't put Sidecar on my Yosemite machine yet, but I'll test it out.
The font in most of the non-fixed-width geeklets is Raleway: http://www.fontsquirrel.com...
I spent all last night and today coming up with virtually that same script for the Dark Sky implementation. Well worth the exercise in grep | sed, etc then finding the Ruby library. :) I don't even know where to begin with the speed test numbers. Is there a speedtest.net api you can get with an account?