Hey All,
Have just spent some time creating a script to update a DNSimple hosted zone record, and thought I'd share, if anyone else is hosting with DNSimple and wants DynDNS like functionality 
More than happy for any feedback or criticism, it's the first linux shell script I've written, tho hopefully not the last
Now onto the next challenge of setting up a cron task to run this every 5 minutes.. (yes, my linux skills are that bad..)
Cheers -Mike
You are aware of the ddns-scripts and the corresponding luci app/frontend?
It should already do what you are looking for. Might be that support for DNSimple need to be added.
I did look briefly at it, but it didn't support dnsimple, and as dnsimple isn't dyndns but web API calls, i moved on.
Have had a closer look, and I think I can probably merge the dnsimple script into that set of scripts in the same way that GoDaddy and CloudFlare are being supported, thanks for the tip!