I also feel to add my opinion.

We consider Squeak as one of the most active used Smalltalk's - Let it be a
toy for someone.
But how many other software-products are also used as toys ?
The quality of Squeak is it's steady improvement by a large community.
We are in the process of creating a Squeak based Smalltalk with deep
OS-Integration.

Frank, www.lesser-software.com