Dougal,
I have seen a number of used Lyra interfaces on eBay lately, and they have been sold for "almost new price". This is especially funny, as Lyra2 has been out since october and it offers some nice new features, such as soft-configuring and multimedia keys. I am a big fan of the original keyboard myself, but they do fade away, and a new keyboard (preferrably in combination with an optical mouse) does help bringing the fun back to computing.
Jens