Thanks for the initiative! It is a great start but I still hope to see a few more features from MoneyFu. Specifically I like to see the changes today, yesterday and this week.
MoneyFu breaks it down with money earned, money spent and net effect and also adds "this session" and a "per hour" option. These extensions are not needed by me but having deltas for today, yesterday and this week would be awesome and allow me to toss MoneyFu out the window.
Also I just realized that the first character in the list is in a bigger font than subsequent characters (and the total).
I usually write very small basic addons to facilitate a specific goal. I'm sure that session based tracking would be easy-peasy to write but I'm not really interested in adding in extra data to track daily/weekly/monthly stats - it's more data then I really need.
Feel free to alter the code and do what you like with it, I uploaded it in the StatsBlock_Money post.
As for the text sizes in the tooltip, I really don't know. I'm just using AddDoubleLine and the top-most entry always seems to have a large font and the following lines seem to scale from mid-sized to small as they are added. Again feel free to tinker with it :)