...almost forgot these folks...

Dr Geep's Site: It comes across as childish at first but on closer inspection proves to be an in depth and comprehensive set of tutorials on the blood and guts of Poser. It's somewhat disorganized in navigation and doesn't appear to have been updated in some time, but remains one of the first places you should visit when learning Poser.http://drgeep.com/

Poser Dependant Parameters by Denis Gravel: An in-depth technical treatise on everything you've ever wanted to know about DPs (ERC, or Extended Remote Control). He's promised more tutorials along this line and I email him every month reminding him of his promise. He has several other tutorials in PDF format that delve into the math behind Poser which are quite interesting in their own right. His paper on Poser Matrix Methods showed me (finally!) why Poser's rotation order is so important. Great material from a fellow Canuck.

http://www.renderosity.com/mod/freestuff/?item_id=71136

English Bob's site: Some excellent tutorials and information on the obj format and what happens to it when saved in various programs. Another prolific supporter of the Poserverse and frequently seen in various forums.

http://www.morphography.uk.vu/index.php

Modeling for Poser by Stefan Kotuziak. For eight bucks it's a good read and provides some interesting insights into errors to avoid when making 3D items for Poser. Has information I've not seen anywhere else. http://www.renderosity.com/mod/bcs/modelling-for-poser/82834/

Unofficial CR2 Specification. Follow the link to many pages detailing the cr2 file specs in all it's gory details.

The site seems to be devoid of activity since the fall but a PDF is available. Grab it in case the site goes under.

http://www.kuroyumes-developmentzone.com/poser/