TeacherRO brings up something interesting when he mentioned the 'pocket on the back' of his PFD.
I've got 24 sea kayaks, paddle on average 200 days a year, have attended too many kayak symposiums to remember.
One thing I noticed on PFDs of British origin are pockets on the back....a rare thing on USA made PFDs.
But back to what to add to the list and in this vane of the back pocket, I would whole heartedly suggest a minimalist instantaneous shelter in that back pocket...something to immediately block the wind, retard the rain, hold in some heat.
Something like this:
http://www.seakayakgeorgia.com/catalog.php?item=34&all=yesIf you have a mini-candle lantern all the better. When wearing one of these:
http://www.kokatat.com/product_detail.asp?code=pscI've squatted down and placed the candle lanter on the ground but between my knees and inside the storm cag-amazing what kind of heat builds up and quickly.
Remembering the rules of 3 its a no brainer that shelter and hypothermia have to be dealth with.
I read the post about lossing a PFD, surely it can happen and at least on my neck lanyard I've got a RAT-3,a Doug Ritter squeezy thumb light (can't remember the exact model name), a whislte, and a mini-ferrocium rod--better than nothing; but if I've go my PFD when I get to shore I'll make that guy in 'Castaway' green with envy.
Here on this site we all know about 'BOBs', in my paddling circle we all have hypothermia bags, some of us carry them in the cockpit of the kayak, others in the day hatch...my hypothermia kit is composed of these two items:
1. Hilleberg BivAnorak
http://www.hilleberg.com/2006%20Products/NewBivanorak.htm2. Bod-i-bag
These two items are also carried when I day hike, the combination of the two is remarkable in its simplicity and the ability to move/cook/ or sleep.
PLBs are awesome for sure....just make sure when they get there you are still alive
http://www.bodibag.com/