We are in the process of opening a 2nd office for growth. Due to our business nature it is absolutely necessary to have access to outlook/exchange so we are wanting a server in each location. There will be a dedicated t1 connection between the two and we would like them to be on the same domain, ie: centrallized user acoounts, permissions, etc. I am curious as to what options we have for setting these up.

Think it as a whole, consolidation will be a good idea, if your link allows you to do so. Make use of Outlook 2003/2007 cache mode; RPC/HTTPS ++ Cheers

If you are SURE you want an Exchange server in the other office, it is as simple as putting a couple of DC/GCs in the other office on the same domain, and plopping a new Exchange server down there. I would stage/load the DCs and the Exchange server at your current office, and change IPs when you move them. Keep in mind that remote servers are harder to manage/harder to secure that servers in your central data center. If you can, as already mentioned, think about just using cache mode at the new office and keep the Exchange server local.