32 bit Versus 64 Bit

Hello every one:

Currently we are on 32 bit sql server 2000. I am trying to convince management to move to 64 bit hardware with sql server 2005.

Dose any one know what are the timelines around SAP's support on 32 bit platform?

Can you direct me to any document on pros and cons of 64 bit versus 32 bit database and their support time lines?

Regards,

K