Here's whatsnew:
Added ZX81 Larken disk support. Preliminary support for ZX1541 (Only memory and IEC
interface coded, still have to emulate the 1541 itself). Fixed a bug which caused
the emulator to crash if the workstation was locked/suspended/hibernated. This
may (but only may!) help with Vista compatability.

Get it here:
http://www.chuntey.com/eightyone/

-Trebor