Fantastic site - and a suggestion.
It would be interesting if there was a way I could upload my portfolio size, you could aggregate all of these and then see what % of each site this sites users made up
eg.
I upload the following
IS 100
LO 400
BS 200
This site totals them
IS 250,000 or 10%
LO 100,000 or 10%
BS 500,000 or 25%
I think you would see some interesting stats
....