Hopefully you see this. The biggest reason I stick with Pocket (despite the privacy implications) is because of its text-to-speech functionality. AFAIK, Pinboard is a website only, so TTS is out of the question. However, might this change in the future?
There is a great app called Voice Dream reader on iOS that takes text from a variety of sources and can do TTS. I think I paid $9.99 for it and bought an Inova voice for $4.99. I love it. I use it to have custom study guides read to me, ePubs, PDFs, text documents and my Instapaper queue.
