We just posted a BibleWorks 8 font update containing the new SBL Unicode Greek font ("SBL Greek"). A new version of the BibleWorks executable has also been posted. The new version uses the SBL Greek as the default Unicode Greek font, but unless you change the font in Setup, this doesn't occur until you initialize the BibleWorks INI file.
When you get the patch the font file (SBL_Grk.ttf) will be placed in your BibleWorks root folder. You must manually install the font using the Windows Control Panel Fonts Applet.
This is an advance copy of the font. The official release on the SBL Web site is imminent.