How do you create an automatic reminder activity based on a date field?
Hmm, being on PE means you are quite limited otherwise Austin's solution would be perfect.
You could use the Excel Connector to mass create a series of tasks related to the new data with a reminder set for a particular date. This would be somewhat manual process but wouldn't take long to setup in Excel, you'd need to specify the reminder date but I'm sure there is a simple formula in Excel you could apply to the list and would then just be a case of uploading the data
Easier than creating a task and reminder on each record one by one but maybe someone else has a better solution.