Does Publishing My Own Work With A Pod Publisher Prevent A Traditional Publisher?

Does publishing my own work with a POD publisher prevent a traditional publisher from working with that particular piece in the future?

Several BookLocker.com authors have gone on to land traditional contracts with their books. (We lost another one just last week!) Traditional publishers are only too happy to allow authors to take the financial risk of testing the market to prove their book can be successful before giving them a contract.