Hi Kully,
If this is SharePoint 2010, it's easy to sort the results of a list data connection. Just use an ODATA Web service call instead. SharePoint 2010 supports REST and REST supports ODATA so you should be able to figure it out. Benefits abound. We have several videos showing how to use REST and ODATA, and it's all out-of-the-box.
If you are using SharePoing 2007, you can sort the list by manually modifying the view's XSL file (File->Publish->Export Source Files, open the View.XSL in notepad and search for the dropdown0. This is relatively easy but if you need help, please let us know. Another option for main data source is to just use qRules Sort command. No code required, but you will need to inject the form with qRules and add a rule to sort the dropdown.
Good luck!