Cashboard has just launched an online time tracking and accounting tool.
Cashboard lets you manage estimates, conduct time tracking, and handle accounting for service-based businesses. Its easy-to-use interface makes sure you know what your clients will see, and has taken into account many of the tools that a business owner would need, especially when it comes to online tools for managing business-oriented information. One of their most useful features is their Basecamp integration. For Projects and Estimates, you can create an estimate for a client that's listed in your Basecamp account, and import Basecamp tasks for your upcoming projects.
In short, Cashboard is a tool that helps you better manage your time and allows you to present yourself in a more professional manner to clients. Other services in this realm include hiTask, IMified and Fluxiom.