Cappuccino and Objective-J will certainly be extremely comfortable for those coming from a Cocoa or GNUStep background. But even for traditional web developers,

Cappuccino and Objective-J will certainly be extremely comfortable for those coming from a Cocoa or GNUStep background. But even for traditional web developers, Objective-J allows you to do some extremely powerful things that just wouldn't be possible otherwise. That said, it is still a strict superset of Javascript, so any valid Javascript is still valid Objective-J, and vice versa. You can read more about it here: http://cappuccino.org/discuss/2008/12/08/on-leaky-abstractions-and-objective-j/ http://cappuccino.org/discuss/2008/12/08/on-leaky-abstractio...