I beg to differ
Beginning with MySQL 4.0, InnoDB engine is enabled by default (unless you disable it, it's there, waiting). MySql 5x has general InnoDB default settings which usually suit most users.
Although InnoDB is more effective with larger volumes of users - it does provide benefits for everyone.
Edit;
for anyone who wants to convert what they have, here's a good tutorial
http://www.tutorialized.com/tutorial...o-InnoDB/15557