Its kinda cool how David mentioned they use Google Spreadsheets for their team task list (if I understood correctly). We do the exact same thing at our startup. Two founders, on one spreadsheet with 3 columns, date---founder---founder and we keep adding these sections of rows for each day. Its great to keep track of what each of us is working on and its fun when we need to answer questions like "where did the week go??"
So yay for ghetto project management.