SWTOR - Datacron Location Spreadsheet
I've created an editable spreadsheet of the SWTOR datacron locations in Google Docs because I found that none of the lists out there were complete, or really accurate, or didn't have all the data I wanted.
This was put together from a few different sites, so some of the information may be inaccurate or wrong, but that's why I'm making it publicly editable; if you find something wrong, fix it!
I hope this is helpful to people who want to collect them all. Here's the document.