Scratch

Ok I mentioned this before but I'll elaborate on the save file idea.
Under Variables, a button that says "Create save data"
You will be able to choose all the variables you want to save.
You will be a given a prompt to name it.
Then you will choose the folder you can save it in. Of course, this is probably going to be limited to somewhere in /user/library/application preferences/<browser> (for mac, I don't remember where the windows location is)
Maybe Java has a separate place for storing files, I dunno.
Then you will be given an option to place a "Locate save file" command block when a sprite is clicked.
When playing the game online...or thru Scratch...
The applet will create a text file readable by the applet only. Or some other format.
When the particular applet is started up, and when the particular sprite is clicked, it will search the folder for the specified save file.
This is probably pretty straight forward, but I've heard Java has a lot more security now so there may be some issues getting into the local machine.

Secondly, there should be a function for hiding/showing variables or lists. I've had to develop a VERY extensive workaround for this in my rpg. It's frustrating as heck.