blanc -> blahn or blank?...

[baccho]

All very well to say who cares, but obviously the fellow wouldn't ask if he didn't want a proper answer. Never mind the fact that 9 out of 10 Americans don't pronounce these words properly, nor do they care to.

Correctly spoken (credentials: I grew up in France and speak French fluently. I now live in the Napa Valley and have worked for quite some time in the wine industry):

BLANC should be pronounced "blangh" -- as close an approximation as I can come up with because neither the n nor the c are actually pronounced. If you ever took French in school, it is that sort of nasalized n sound, you know...

As for sommelier, it is properly pronounced som-uh-lyé.

And that's that! Have fun with your new-found information...

Karen