"I want to be able to retrieve all the information i need from *.wav files into my own format."

Do you really want to do this yourself?
I use CoolEdit-2000 to do audio editing - it includes facilities to save the audio data as an ASCII text hex dump, or a pure binary dump. It can read just about any audio file - not limited to just WAVs.
Unfortunately, CoolEdit-2k is no longer available: http://www.adobe.com/special/p...llium.html
However, there are loads of other audio utilities out there - including many good free ones.
I would suggest that one of these would be a better bet - rather than trying to reverse-engineer the WAV format (it's not trivial) from scratch.

You will probably need an audio editor anyway to prepare your clips!

"I need to play sounds clips such as those Homer quotes on the web"

If you're developing a commercial product, beware that these are almost certainly copyright.

"What feq. do you suggest?"

As noted elsewhere, we presume you mean sample rate?
Again, a decent PC utility would handle sample-rate conversion for you.

Have you looked at the Atmel at89c51SND1?
http://www.8052.com/forum/read.phtml?id=54092