Development is proceeding quickly these days, and the Subversion repository reached revision 600 moments ago. The changelog reads "Added icon for 'default' button and removed 'set' prefix from embedded icons". In the meantime, here's the current version of the logo, together with the small 'favicon' to make browsers happy:

(Yes, it does a look a bit web-two-point-oh-ish. Get over it).

As for the 'lambda' in the logo, besides the obvious aesthetic reason of pairing well with the 'y', there's another good justification for it. (Yes, it's the one you might be thinking of; I'll get back to that subject some other time).