Here's whatsnew:
implemented Digi-Blaster emulation
added limited support for error information in D64 files
new option for setting SID model (6581 or 8580) to be emulated
P00 format files can be loaded
emulation speed percentage is now displayed on the title bar; it is also possible to set half, double, etc. speed in the menu
the head position (track, side, and sector) of all floppy drives can be displayed in a window

Get it here:
http://plus4emu.sourceforge.net/

-Trebor