not Yamaha, but there is a relatively inexpensive upgrade disk that was available in Germany that included Yamaha. Unofficially this upgraded disk should be supplied with the 7000, according to the programmer, but there is no official information about this for certain yet. I have not had a chance to try this disk with the new session styles, but it should work with the majority older styles on these boards.
as for the va7, I converted the entire library with the EMC program. The module on the disk supplied with the 6500 should be the same, or very similar, and is marked for e96, g800 format. Since there is no difference to the older format I see no reason why the disk should not work with va7 files, so would say yes.
check out Gunnar Jonnys site, one of the best on the web,
http://home.c2i.net/gjgotaas/ he has many conversions that will load into 6500.