I know that some people have found it intimidating to get their feet wet
in learning the Squeak environment as a pre-requisite to developing
applications on the Croquet SDK.
There's a new book out on Squeak that is available in many formats
(paper, free pdf, source, etc.).
http://www.iam.unibe.ch/~scg/SBE/I have not read the book, but I'm glad it's available.
-H
See also:
http://opencroquet.org/index.php/Tutorials#Learning_Squeakhttp://opencroquet.org/index.php/Tutorials#Books