for my invoices i need to take the data on a project by project basis, for a given time period, and get it out in a format very much like the Project View | Time Entries.
Is there an easy way to do this. I feel I’m missing something very obvious!
Try http://www.fetchflow.com/invoice-templates. Here you can make invoices and can make its output in any format according to the need of your project. Templates are absolutely free and have lots of unique features. You can easily use them for your projects and make any changes at any time.