Here is a script that a friend wrote: http://www.jeffparrott.com/transfer/PsdPathExporterWin.mel It's exports the UVs of an object as a javascript file and you go to File>Scripts>Browse and find the .js file. Zach Burns wrote this as a student. He's a pretty talented mel scripter. Any questions just pm me.
Max has a really cool plugin called PSDPathUnwrapper that basically saves out your UVs as paths in a PSD files, I was wondering if there was such a script for Maya. Thanks