Vote Details for "Services_Memotoo" by till

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Looks pretty clean. Very cool!

Though I have two things:
1) your file layout is off, you want:
Services/Memotoo.php
Services/Memotoo/Exception.php

2) (RE: visibility) I'd go with protected instead of private, private is only accessible from the class that defines them, if I extend your class I wouldn't be able to use them.