hey man, just putting my 2 cents in.
i JUST upgraded my computer, got a new mobo but used the old pentium dual core processor and ram (that came with it). it didnt post at first - but the motherboard was powered up, fans ran etc etc - no beeps here either.
so - i returned the mobo, bought another model - the same shiz. i went back to fry's where i talked to a guy in the repair department who said that if something doesn't post on screen (but the monitor is working), it is not usually the gpu - but its an issue with the RAM or the cpu compatibility. IF your mobo supports your cpu - and other posts say that it does, i would try newer ram - i know you said you tried. in my case i have 2 sticks of 512 that came with my dell, and 2 new sticks. It posted just fine as soon as i removed the old sticks (those came with the original dell).
have you tried putting in newer ram sticks or something? if you have, and this is helpless i am sorry man, good luck with the upgrade.
EDIT: lol.... just read your name, replace all "man" in the post with "girl"