We are recording the growth of these lists over time [on this spreadsheet](https://docs.google.com/spreadsheet/ccc?key=0AlY4Tg28DhosdGlzd0RCaFdGYXNWR0pHZEV3R0lCV2c#gid=0) and graphing the results here to track community growth. (You can also see activity over time on [the Google Groups about pages](https://groups.google.com/forum/#!aboutgroup/publiclaboratory))

<iframe src="https://docs.google.com/spreadsheets/d/1_yWDAELxsklghA6QLd_ZbJ1wXh3jHGSnu2RFo1jQ5V4/pubchart?oid=2&amp;format=interactive"></iframe>