Would anyone be willing to start/join a Sheffield Forum LETS Scheme (Local Exchange and trading system)

If so what services could/would you offer and what would you expect in return?

What would the currency be?

Lizz started something similar here (http://www.sheffieldforum.co.uk/showthread.php?t=111800)
which I thought was a great idea but it doesn't seem to have taken off :(