If you look at the original language. The name YHWH, as given to Moses when he asked, which has been translated as "I Am that I Am" is actually "I will be what I will be" which are the present and future tenses of the word...
Shawn,
The name you're referring to isn't YHVH, though. The name God gave to Moses when he spoke to him from the burning bush is EHIEH. That's the one that can be translated either "I Am that I Am" or "I will be what I will be."
I don't know where you're getting your information, but it doesn't seem to be from Jewish sources. I don't even read Hebrew, but even I know that! I do seem to retain the meaning of every Hebrew word I ever came across in my reading, though.
--Linda