well..there is now a site that gives the pronunciation of English word & phrases.. http://www.howjsay.com/, with instant sound.

It IS done from a Brit perspective, but they do recognize that alternatives exist...*grin* I tried it on aluminium/aluminum and you can almost hear the disdain for 'aluminum' in the speakers voice....but I have to say, the site is VERY well done and could be much help to non-English speakers who want to practice.

These disclaimers are priceless!
"Where alternative pronunciations are given, they are either
a widely used World English alternative (Eg "cóntroversy" versus "contróversy"). In these cases the first alternative has the status of being the recommended one, on the basis of its having the widest acceptance globally or...etc...."

"Some people are quite passionate about the pronunciation of, for example, "contróversy". But it is our task here to record the sounds of current educated English rather than to prescribe them. The fact is that the American "cóntroversy" now enjoys wide acceptance throughout the English-speaking world (not least perhaps due to the phonologically seditious work of CNN), and so it is our duty, however sombre, or indeed somber, to offer it as an alternative to "contróversy". It is of such stiff stuff that the upper lip of the British phonetician should be fashioned, giving short shrift to chauvinism."