Soundflavor is the latest playlist sharing service to move beyond just their sharing community (see my review) to offer a software download that plugs into iTunes to recommend playlists. The download is called Soundflavor DJ™, and you can download it here.
I haven't been able to try the software yet as it's only available for Windows, but versions for Mac and for players other than iTunes are promised. From the descriptions, it looks like a fairly similar product to the MyStrands plug-in. It also supports discovery of music in other people's libraries (provided you are on the same local area network), which is an interesting extra dimension.
I like the way that, on the same day they announce the product, Soundflavor also publicise some research that shows — guess what — that digital music users are crying out for just the kind of support that Soundflavor DJ offers.
Under the heading "New Research Shows Consumers Suffering From Digital Music Overload", here are the key findings they report.