Hi Scott,
for #3, check out LABKEY.Utils.setWebpartTitle().
for #2, how would you anticipate using that?
for #1, if all you need to do is find the tables, you might be able to do something like:
Ext4.query('table[class=labkey-wp]');
to find all rendered webparts. the above is not tested, and you might need to tweak that query. I dont think that would automatically tell you any context about the webpart, such as the webpart type.
An Ext component query along the lines of what I suggest for #1 might also help identify webparts with a particular Ext component.
-Ben |