Can sudo's annoying message be removed from Mountain Lion 10.8.0?
Do you have any other DYLD_ variables set? Run set with no parameters to see all variables and unset anything that comes up with that prefix.

Note that it looks like this is really just a workaround for a bug, those messages shouldn't be printed unless you have DYLD_PRINT_WARNINGS enabled.

Also, the update to 10.8.1 seems to have patched this annoyance.