INNODB vs MyISAM

[Don Vu]

Hi guys,
 
Do both MyISAM tables and INNODB tables support foreign keys in 4.0.15?
If so, are the main advantages of using INNODB tables the added features
of transactions, cascading deletes, and it's other more robust features?
Any thoughts on any disadvantages of INNODB to MyISAM? I know that
INSERTS, UPDATES and DELETES will be slower with INNODB cuz of the
transaction overhead, but do you think the SELECT speed is about the
same?
 
any feedback appreciated.
 
thanks,
Don