Marketcircle today released beta 2 of Billings 2, its software designed for the needs of Mac-based business and creative professionals. Billings 2 tracks time and expenses, and creates detailed, customized invoices, project estimates, and reports. This new beta version offers improved stability and brings a number of additions to the application. Available as a final production version by the end of this year, Billings 2 can be purchased for US$49 during the month of November, and $59 starting December 1.