A very nice flag would be wyUpdate.exe /quickcheck /patchnotes (spit it to STDOUT) or wyUpdate.exe /quickcheck /notesToFile=foo.txt
OK, we'll add it to the 2.7.0 release (or if we make a 2.6.16 release we'll add it to that).
So far I'm really impressed with wyBuild & wyUpdate, you guys have done a fantastic job!
Thanks, that means a lot.