I think it'd be great if you could add the total dpeths of order books in the "widgets" on first page.
This can be retrieved by opening a single chart, say BTCUSD, and scrolling the asks book to top and bids book to bottom but this is a bit un comfortable with long books, also any updates reset the two books to showing the spread.
It it's already there and I just couldn't find please let me know.
That apart the site looks very good now, the home page (the one with the widgets) is doing a terric job at summing up a lot of useful info.
Are the widgets embeddable in external website?