Elfen: It was I who sold you that Mini, and I believe it was a CoreDuo (can't remember if I included a C2D CPU for future upgrading, though). Still no luck on that PSU, sadly (as I might've said before, my friend misplaced it during a move).
CompuNurd: A1176 could mean either Early 2006 (1.5 GHz CoreSolo or 1.66 GHz CoreDuo), Late 2006 (1.66 or 1.83 GHz CoreDuo), or Mid 2007 (1.83 GHz or 2.0 GHz Core2Duo). The only way to tell conclusively is to boot them up (an installer DVD should be enough), open System Profiler and look at the model identifier. If it says "MacMini1,1", than it's either an Early 2006 or a Late 2006. If it says "MacMini2,1", then it's a Mid 2007.
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CompuNurd: A1176 could mean either Early 2006 (1.5 GHz CoreSolo or 1.66 GHz CoreDuo), Late 2006 (1.66 or 1.83 GHz CoreDuo), or Mid 2007 (1.83 GHz or 2.0 GHz Core2Duo). The only way to tell conclusively is to boot them up (an installer DVD should be enough), open System Profiler and look at the model identifier. If it says "MacMini1,1", than it's either an Early 2006 or a Late 2006. If it says "MacMini2,1", then it's a Mid 2007.
c