First: I've just found that thread a minute ago and I'm quite amused about the fact, that people from overseas care for the correct pronunciation - which I think is a nice gesture of respect, as you could say. And since I'm from Germany and most of the sported brands are from Switzerland, it's easy for me to pronounce them right, as a native speaker. The most "corrections" were right, so far.
But then I saw the OMEGA-discussion and I'm glad to help you out.
Here's a comment, referring to the "problem":
First thing is: Mr. James Bond DID mispronounced the brand! It's not "Oh-Meeeeeeee-gah". I was laughing as I was watching the movie.
You speak out the vowels as short as possible. Just like that: "Oh-Meh-ga" - you can even forget the h after ga - you don't "stretch" the me and ga out. And don't try the US-style "eeeeeee" on the me part. Won't work with a swiss watch smith. ;]
BTW:
I am watching a lot of US-television, etc. and I saw some hilarious action a few years ago on some celebrity talk show - I've even forget about the name of the show, I guess it was something like a pre-Oscar special or something. Anyway, there was an interview with Gwyneth Paltrow and the interviewer asked her about her shopping habits. She told him, that she likes to buy expensive Italian clothes - the interviewer again, asked her about her favorite brands and she said, as it's the most common thing in the world "Ghukki" (as you would say Cookie, just with the G) and "Channnnnelll" (outspoken as the TV-channel) - I was literally laughing my ass off.
She obviously meant Gucci and Chanel, but managed it to mispronounce her favorite brands in the most professional way.
####
And another one:
Actually the thing is funny, but still wrong.
The English pronunciation is obviously clear, but to say it right all the way, you have to spell the three letters in good old Swiss/German.
Then it would be "Eeeh-Vehhhh-Tzehhhh".