I have joined the ranks of folks that nuked their regulator and could use a replacement. After some searching of the forum and was able to desolder the toasted regulator and get my moteino up and running with 2x AA batteries. However, I was unsure which was the correct replacement part based on finding multiple replies to posts.
http://www.digikey.com/product-detail/en/MCP1703T-3302E%2FCB/MCP1703T-3302E%2FCBCT-ND/1776945
or
http://www.digikey.com/product-detail/en/MCP1702T-3302E%2FCB/MCP1702T-3302E%2FCBCT-ND/1979828
Also, if I can order them directly from the site that works too :)
MCP1703 is the OEM :)