I was on vacation for 15 days and away from my Mac for a week. After a short trip to Bariloche, I returned home and was able to complete my rework of the Clients view, which was a simple NSTableView. In the process I also fixed some bugs and made several cosmetic changes. But most of the work was on preparing the database model to support invoices.
FreelanceStation is now almost ready, lacking invoicing support and reports. The next alpha release will include full invoicing, and the next one some reports, preparing for a beta release around April.