Dynamically (automatically) change the "download folder" in Safari Saft -- the (now seemingly defunct as of Safari 5.1) Safari plugin -- had the ability to change the name of the download folder (and create said folder if it didn't already exist) that Safari uses (e.g., by creating a name based on the date).  This was incredibly useful for decluttering/ordering my downloads.

Is there any comparable feature in a supported Safari extension (for Safari 5.1)?

P.S.  I know I can create a cron job to do this after the fact, but that seems kludgey and prone to errors because of file timestamps, automatically unpacked ZIP/tar/cpio files, etc.
I am using the Glims Safari Plugin (ver1.0b29) in Safari 5.1 (OSX Lion), which has the feature "Create dated folder for downloaded files".