In reply to tizer:
I had exactly that same injury (fracture to the neck of the talus and Hawkins type II subluxation (that's 'partial dislocation' in English!) last May. Two 5cm stainless steel screws (permanently) inserted into the talus.
I was in a cast for 7 weeks..walked (with difficulty and some pain) using two crutches for about 4-5 weeks after that and was then able to walk using a single crutch before starting to walk completely unaided 16-18 weeks after the accident. I started hill-walking five months after the injury (with some pain and using trekking poles constantly: this was, shall we say, not exactly following the Orthopod's advice to the letter!). Gradually since then I have got to the stage where I can hillwalk (for 6-7 hours) without too much swelling occuring afterwards (usually!).
I'm going indoor climbing later this week (first time in nearly 13 months). I hope to get climbing outdoors later in the summer. I might have started climbing sooner but am balancing one of my Orthopaedic Consulants' advice (I've seen a few: I keep going back for regular check-ups because of the risk of avascular necrosis) not to climb at all until at least 2 years after the accident, when the bopne should be fully re-generated (which would be May next year!) with my own wish to get back into it asap.
The main long-term risk, as they should have told you by now, is avascular necrosis (30-50% risk for type II displacements like what we've had). It doesn't appear to have happened in my case (they should be able to give you a rough idea of the risk 6-8 weeks after the fracture: immediately after the fracture is too soon to tell) but there's still a risk which is the reason for my Orthopod's concern at my climbing ambitions: even a small fall (say, on a ground move before the rope starts to protect!) could, in some cases, jar the bone sufficiently to cause this to occur. I have to be aware of this as, if avascular necrosis does develop, it would most likely have to be treated by fusing the ankle (which might disrupt my mountain ambitions just a tad!)
I was lucky with Physio (compared to some of the stories I've seen here). I was seen within a few days of having the cast removed (be prepared to spend some time on the phone ensuring that the various departments (i.e. Ortho and Physio) talk to each other!) and continued to see them regularly until December (i.e. 7 months post-injury) by which time I could walk around town with absolutely no problems.
Since then, to get my ankle strong enough to climb, I've concentrated on going to the gym (have stopped running: would still be too painfull to run regularly anyway!) and occasionally seeing a sports therapist such that the range of motion in my injured left ankle is now about 90-95% of the right ankle (even though it's still noticably swollen!)
I also, shortly after I started Physio last year, bought a wobble board, wobble cushion and cryo-cuff (iced water to reduce swelling!) so I could do alot of physio myself at home every day
On a more positive note, I had no problems with the cold in my ankle last winter (or when I was in -15deg temperatures in Nepal earlier this year)
It's not a nice injury but every individual injury is subtly different and how soon you get back to climbing really depends on how much ligament damage you did (If it's a type II fracture, you're unfortunately bound to have some ligament damage, but hopefully not as much as I did!). Hopefully you'll be able to get back to it sooner than me!
I attach one link but would warn you that it didn't make for cheerful reading for me when I read it shortly after my injury: you just have to remind yourself that not everyone suffers the worst case!
http://www.wheelessonline.com/ortho/hawkins_type_ii_talar_frx
One thing one of my consultants acknowledged is that avascular necrosis is very poorly understood: they really don't know why it occurs with some type II fractures and not others; this is, I suppose, why advice I've received from different Orthopods I've seen recently has ranged from " don't worry, get on with your life: if it was going to happen, it would have happened by now" to the more pessimistic advice of another telling me not to climb before May 2008!
Good luck and mail me if you want any more info!