Confused about MyISAM vs InnoDB tabel types

[PAUL MENARD]

Can anyone either summarize for me a comparison between the MyISAM and InnoDB MySQL 
table type? 
 
I am getting ready to upgrade from MySQL 3.23.42 to 4.0.13 in the coming week and 
started reading the upgrade documents on the www.mysql.com site. Never had even 
thought about using another table type since my current database seems to work fine. 
But thought I would ask.