I'm nearing completion of the kernel language of my new Lisp, the Executable and Linkable Lisp, ell(1).
It's basically what I want from a modern Lisp, as simple as possible, but not simpler. The language will be translated to straightforward C (or C++, don't know yet), and enable true Lisp dynamicity and very deep Unix integration.
The major goal of the language is to make programming delightful. Of the "right" kinds of programs that is, since a language can't be delightful for everything.
Dave Moon's Programming Language for Old Timers also proves a great inspiration again. Am I an old-timer already? Dunno.
Specifically, Moon gives a no-nonsense description of hygiene, something which the Schemers have slight trouble with, as they seem to be a bit high on their own kleverness.