Cruising With a 2 Year Old

We are considering cruising in February with our son who will be 2 at that time.

Can anyone recommend a line that provides daytime babysitting for children at that age (he likely won't be pottytrained) and are also kid friendly?

We're looking for alternatives to Disney.

Thanks!

Check out the Princess cruise line. I saw that their children's program starts at 2 years old.

Hi:
I'm the family cruise editor here. Actually Princess used to take 2 year olds, but don't any longer. Their youth program starts at 3 years old and kids must be potty trained.
For two year olds, check out Norwegian Cruise Line and Carnival, since both accept kids two and over in the youth program. Kids don't have to be potty trained to participate. Carnival changes diapers while NCL will give you a beeper so you can come change a dirty diaper. Both have good youth programs.
Feel free to ask any add'l Q's.
Smooth sailing,
Luisa Frey Gaynor