English sounds `v' and `w'

Hi all,
        I don't know if this is silly but I wanted to confirm the exact
difference betwwen the sound `v' and `w' in the English language and their
IPA representation in ASCII.  I think that both the sounds `v' and `w' ar
not aspirated in English and the only difference is that `v'(isn't it the
same as the hindi `v'?) is labio-dental and `w' is bilabial.  Is this right?
 Also is there any difference in the articulation of these two sounds
between US and British English? Also, is there any online resource for
proper pronounciation of the IPA symbols(ie. audio files)?  There are some
audios at the IPA site, but they're too noisy to be of much help.

Shanth
``Quidquid latine dictum sit, altum videtur''
http://home.iitk.ac.in/student/shanth

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