Ok, so this news is a little late, but maybe you missed it so here it is.  iFixit has taken the time to go out and purchase a Mac Mini of the 2010 variety and take it apart piece by piece for us all to see.  The design is a simple block of aluminum that has a cap on the bottom which simply twists off.  The back has your standard ports and the rest is a solid chunk of beautifully crafted unibody-style aluminum.  See the full teardown at iFixit.

[iFixit Mac Mini 2010 – Teardown]