SBCL 1.0.1 has been released.

It is tagged in CVS and up on the File Releases page at SourceForge.
Enjoy, and merry New Year.

from the NEWS file in the distribution:
changes in sbcl-1.0.1 relative to sbcl-1.0:
  * new platform: FreeBSD/x86-64, including support for threading.
  * new feature: the compiler stores cross-referencing information
    abount function calls (who-calls), macroexpansion (who-macroexpands)
    and special variables (who-binds, who-sets, who-references) for code
    compiled with (< SPACE 3). This information is available through the
    sb-introspect contrib.
  * new feature: users may subclass SEQUENCE, and have instances of
    these classes interoperate with standard Common Lisp functions if
    a number of methods are defined.  (This feature is experimental
    and the interface subject to change based on feedback from SBCL
    users and the general community)
  * improvement: sb-sprof traces call stacks to an arbitrary depth on
    x86/x86-64, rather than the previous fixed depth of 8
  * improvement: another pthread back-end of mutex "pthread-futex".
  * bug fix: non-ascii command-line arguments are processed correctly 
    (thanks to Yaroslav Kavenchuk)
  * bug fix: non-required arguments were not passed correctly when a method
    defined using DEFMETHOD was called from a mop-generated method using
    CALL-NEXT-METHOD (reported by Pascal Costanza)
  * bug fix: recursion is now permitted in accessors through
    SLOT-UNBOUND.  (reported by Pascal Costanza)
  * bug fix: an error was signaled at startup if the HOME environment 
    variable was defined, but had an empty value (reported by Peter Van Eynde)
  * bug fix: non ordinary lambda-list keyword in ordinary lambda lists
    signal a PROGRAM-ERROR, not a BUG.