Boohoo, big deal - Nikon, as usually, is very late (5 years) to the party - in fact the LAST ONE...
...because Olympus introduced the first built-in Supersonic Wave Filter dust-off system ~5 years ago, in 2003's E1 if I recall correctly.
Sony's (ex-Konica-Minolta) first DSLR, the A100 came out in Summer 2006 and featured similar dust removal filtering.
Pentax followed suit with K10 as well as Canon with 400D/Rebel XTi, both arrived in Fall 2006.
Nikon, as always, lacks way behind even in implementing a known technology, let alone actually inventing something - but, of course, PR touts it if something big has happened... not.