The Issue
If, when launching Logic Pro 8.0 after installing Pitch 'n Time LE, you don't have an authorized iLok inserted Logic Pro will disable Pitch 'n Time LE. Pitch 'n Time LE will not be visible in the algorithm selections and inserting your iLok and/or restarting Logic Pro will not help to make Pitch 'n Time LE available.

The Solution
Start Logic Pro 8.0 and ensure your authorized iLok is inserted. SelectPreferences → Audio Unit Manager and check "Pitch 'n Time LE".

Pitch 'n Time LE will now once again be available to use.