OK, this is mainly off topic as I rarely use it for work but wondered if anyone else uses Instapaper with their Kindle? I save articles online to Instapaper and then try and send them to my kindle - sometimes this works and sometimes it doesn't. Not sure why. Has anyone else had more success?

Afraid I haven't tried it with my Kindle. I didn't even know you could, so there's something new for me. I've only recently started using Instapaper, only with my iPad so far.