It’s close, but it is Huhne, according to YouGov’s poll of LibDems:

Huhne 32%, Ming 29%, Simon Hughes 23%, Undecided 16%

Only 14% think Simon Hughes is honest!

40% think ‘Simon Hughes is too unreliable to lead the Liberal Democrats’

36% think ‘Sir Menzies Campbell is too old to lead the Liberal Democrats’

Full stats here.