Nancy: 16 years in Hudson valley (no. suburban NYC), then Providence, Boston, now Californian by preference and adoption. Though surrounded by it, I didn't ever fully use the accent of the region where I grew up (thankfully) though neither did I fully pick up a west coast accent later on. People who hear my accent now usually identify it as vaguely east coast.
Claudia: very perceptive. I also pronounce it that way when speaking English. In AE we put the stress on the 3rd syllable -O- which means that syllable 2 (-ra-) is unstressed and therefore by the phonetic rules of English would normally be a schwa sound (sound of 'a' in 'about'), but this is awkward and we don't handle unstressed-a plus o very well. As search of Websters 1913 unabridged using regular expressions turns up only 12 different roots, many of which we simply ignore the unstressed 'a', for example Pharaoh and extraordinary (some dialects). For some reason, in words with a combining prefix with a secondary stress (like supra-, infra-, etc.) I do pronounce both the 'a' and the 'o', e.g.: infraocular, supraoccipital.
By the way, this is a great source for research, because regular expression searches are a great way to answer many kinds of questions. Here's a standard English parlor-game type question you can try:
What English word or words have all five vowels (aeiou) in the word, in alphabetical order? There are two common ones, and several others.
To find the answer, go to http://www.dict.org/bin/Dict
and search for
^[^ aeiou]*a[^ aeiou]*e[^ aeiou]*i[^ aeiou]*o[^ aeiou]*u[^ aeiou]*$
using Old basic regular expressions and Webster's unabridged 1913.