Silly, silly, silly me...
Overlooking the obvious that I already know.
Epic level are coming.
The level cap will eventually go to 30 (maybe higher).
Going back to the Epic Rules for 3rd edition handbook~~
When one hits level 21, one can take an epic level in a class that already has 20 levels,
or you can take a level in another class.
Hence, a fighter might have 20 normal levels along with 10 epic levels,
or a fighter might have 18 normal levels for Kensie 3 along with 12 cleric levels for Radiant Servant 2.
Obviously the list would go on, and the Epic enhancements are separate from heroic enhancements, but the class potential splits could be far different than people are describing here in this thread.
http://www.dandwiki.com/wiki/SRD:Epic_Level_Basics