zeogold: Although I thought the pronunciation of "Kappa" was kind of universal. It's not really hard to deduce from how the word looks. Besides, isn't it a Japanese word anyways?
Now that you mention it... how do YOU (as a native English speaker) pronounce it?!? Do you pronounce it differently than how you would pronounce e.g. "Kapa"?
In Finnish (being a phonetic language) it is quite clear how those two are pronounced differently, and in Finnish we have lots of words like that where the only difference is the number of consonants there, like:
moka <=> mokka
Pisa <=> pissa
etc., same goes to vowels too like "kivi <=> kiivi" etc.
I've just noticed that for many foreigners(!) it is hard to understand first what's the difference in pronunciation if there is one or two consonants or vowels in a Finnish word. Just pronounce how it is written, dammit! :)
EDIT: So basically, is it clear to you how to pronounce these words:
kapa
kappa
kaapa
kaappa
(that covers both the double-consonant and double-vowel cases)