Sometimes logos changes slightly each time, and the change is so not noticeable that over the span of a few years we don't even notice. A few years later we look back in time and are like: "Woah! that looks so old skool!"
As for Omnimaga logo, it changed completely between 2001 and 2004, but after 2004 it didn't anymore

I wonder about Cemetech... it would be interesting to compare each site logos over the time.
EDIT: Here we go. My favorites are the 2002 and 2008 ones.
2000

2002 (?)


Late 2005

Late 2006

Early 2007 (Same as in 2005)

Late 2008

EDIT: Now Omnimaga logos, aside from calc ones, just for fun:
September 2001

September 2002

February 2004
