Airlines have been announcing their business class fare sales to Europe for the Thanksgiving and Christmas time periods. Fares generally start in the $1600 round trip range (about 1/3rd the regular fares). A few of the highlights:
Continental Airlines business class deals to Europe start at under $1300 round trip (plus tax), including flights from Newark to Brussels, Manchester and many more.
SAS offers cheap business class fares starting at just over $1400 round trip (plus tax) including flights to Oslo and Stockholm.
Lufthansa has cheap business class fares for under $1200 for flights to London and many other European cities.