While following Cyanogenmod's steps to build CM for my Ray, the repo sync command froze. 'ps -ef --forest', the Linux' take on ptree, told me it was stuck doing 'git-remote-https github https://github.com/CyanogenMod/android_external_svox' and a quick google search took me to http://forum.cyanogenmod.org/topic/103527-cannot-repo-source-code-as-android-external-svox-repository-meets-dmca-issue/
ugh...

So, here's the first workaround:

   <project path="external/srtp" name="platform/external/srtp" remote="aosp" revision="refs/tags/android-4.0.4_r2.1" />
   <project path="external/stlport" name="CyanogenMod/android_external_stlport" />
   <project path="external/strace" name="CyanogenMod/android_external_strace" />
-  <project path="external/svox" name="CyanogenMod/android_external_svox" />
+  <project path="external/svox" name="platform/external/svox" remote="aosp" revision="refs/tags/android-4.0.4_r2.1" />
   <project path="external/tagsoup" name="CyanogenMod/android_external_tagsoup" />
   <project path="external/tcpdump" name="CyanogenMod/android_external_tcpdump" />
   <project path="external/tinyalsa" name="platform/external/tinyalsa" remote="aosp" revision="refs/tags/android-4.0.4_r2.1" />

and I also had to issue
rm external/svox/
before running sync again