Got to say that I'm feeling good at the moment. Strong and fit. Not doing that much tapering though!! Did a 160 length non stop pool swim yesterday... slightly more than IronMan distance (4km).
The tri-talk website - http://www.tritalk.co.uk/forums/viewtopic.php?t=17759&start=900
has loads of tips for IM which is helping focus my mind.
Top on my list of priorities (now I know I'm fit enough) is nutrition (especially on the bike) and avoiding sun burn with ten hours on the bike and run (maybe more! :-( )