Also (since I seem to be the roll right now :-) ), I would just like to register my vote to keep the current behaviour of The Unarchiver of extracting one file archives into the current folder and archives with multiple files into a new subfolder.

It has been requested on MacUpdate that ALL extractions should be into a new folder, regardless if one or multiple files. I don't think that is a good idea, and at least should be optional for users who prefer the current way.