Haven't heard of anything new but here's a great write up on dusting by jim fischer, it's a good one even for the experienced beekeeper:
http://listserv.albany.edu:8080/cgi-bin/wa?A2=ind0105D&L=BEE-L&P=R1576&D=0&H=0&I=-3&O=T&T=0
http://listserv.albany.edu:8080/cgi-bin/wa?A2=ind0105D&L=BEE-L&P=R1576&D=0&H=0&I=-3&O=T&T=0