Has anyone on here ever been involved in one of these style challenges. the ones over 3 days where you are usually in a team of 4 and you have to take part in loads of different disciplines. I saw a programme about one in particular that took part in Borneo the other day and it looked hard but a really cool thing to do??
Where do you begin to find out about the possibility of joining a team??
Any advice would be helpful.

Not sure about this one,are you talking about advenventure type of events.These usually take place abroad,i think that they are very popular in new zealand,and argentina!!
But i think that they are becoming more and more popular in the uk,best bet would be to buy a magazine that deals with out-door persuits.Or climbing type magazines,have you try'd google,they may come up with some thing,this is some thing that i and a couple of people i know would be interested in having a look at.
If you come up with some-thing let me know,and visa-versa.,and remember when your training "a bit pain makes you know your alive"(Lance Armstrong)

train hard
john t