I'm not questioning its efficiency at all... I can say the same for mine...
I'm only trying to find a way here. We have 2 mods doing about the same thing :
Mine is almost finished in the pnRender (and 0.8 ) mode but lack one feature from yours (Pending application). On the other side, it has features yours doens't have : Max user setting, groupmaster, etc...
http://dev.pnconcept.com/index.php?module=projects&view=1&id=2
Yours is in a late state that you will have to rewrite it anyway from the ground up (unless it's already done).
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So this leads back to my first question, was this "replacement" discussed or only an ambition you have ? (sorry if the word is not the right one or not sounding right, just woke up and my english stayed in bed he he ! ).
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Guess I'll go with the offer : Merging.
The fact is that I don't care (and won't start any war on that

) who's mod will or should replace the actual. It's either yours, mine or leave them both at the state of third party.
But I really think that the 0.8 could benefits from both...
Since I have CVS access and that I don't remember hearing that a dev took the Groups mod to his own to work on... it's kind of free to work on.
I could take yours and mine, merge them and commit most of both features to the CVS when it's finished and after you have validate it (of course).
In the meantime, the CVS Groups mod (with the work done) could be extracted from the CVS, renamed "pnGroups" (and all functions) for the use of people now while waiting for the 0.8 package... all will already be in the official Groups mod.
Do I sound correctly ?...... my mind really stayed in bed and left me only a headache...
Anyway... guess you got my meaning...