I'm just having a tidy up of the blog to, hopefully, make it much easier to find what you want. The PF pocket novels didn't have their own category, so I'm adding that into the link list now.
(If you're not sure how to find particular guidelines, this page explains it.)
Coincidentally, since I created this post PF have been tweeting requests for submissions of 37.000 word pocket novels - not 42,000 as stated in the guidelines. I've contacted Tracey Steel and can confirm 37,000 words is now correct and that the guidelines will be updated soon.