In reply to rickukc:
I had similar op to you a couple of years ago to treat arthrosis and pain in the joint - in my case, pinned, fused and plastered (and big toe shortened by about a centimetre as a result of bone removal either side of the joint). I'd echo much of what's been said by the others, particularly re benefit of stiffer, very carefully fitted footwear. For hillwalking, I wear my Scarpa Mantas a lot more now; for rockclmbing, I'm happy in edging boots like the Scarpa TechnoXs I've just got but have had to retire my Anastasi Pinks and the like (wish I could get my hands on Scarpa's old series of Crag Rat/Super Rat/Rockstar or La Sportiva Megas - I reckon they'd be perfect compromise). The only real reminder I get that the joint's fused is from hard smearing on gritstone, where my foot simply won't fold as much as it did. Recently had a couple of days on the Cuillin Ridge traverse in 5.10 Camp 4 approach shoes and never had to give the fused joint a thought. All in all, I've been very happy with the result: all pain's been abolished, it's very strong and it's given me a new lease of life after years of doing less and less climbing. The two main thing I'd add to the advice the others gave are:
(1)choose your surgeon with care, i.e., have a good chat with your GP and ask for a referral to a recognised opinion leader in a teaching hospital if there's one close enough and then make sure the surgeon understands what you need your foot to do. Ask around local physios - they tend to have clear consensus on who the good guys are, including the ones that are good at getting a good result for sportspeople.
(2) beware of gait changes that can cause knock-on damage to knee, hip, etc. I got a referral to podiatric/biomech physio for help to rebalance my gait but still get a bit of hip ache occasionally.
Hope this helps.
Gary