Ahh, that's cool, I made a retention clip using those holes after the 2coolcomputer waterblock's clip sheared a lug off my last motherboard.. Actually using that clip right now while I wait for my socket A silverblock from OCWC.. Those 4 holes are most definately the single most cool thing added to motherboards since the lugs were first introduced on socket 3 boards..

(Did they even have them? Maybe it wasn't till socket 4 or 5..)
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The UnaClocker
Overclock till it goes BOOM!
Watercooler extraordinaire!