Customer Database/Spreadsheet

I need people on my sales floor to be able to fill in an online form. The data is then passed to a database or a spread sheet. That data must be sorted properly, It is mostly names and phone numbers. I am currently using google docs and forms and I like it, but it is limited for my needs. I would either need a php/mysql solution or to simple extend google doc (using the google docs api) to suit my sorting needs.