I cant use touchdown because we don't have certs installed on our servers and we cannot access them from outside the network other than going through the portal which essentially puts you on the network. Then we have e-mail per OWA. lol.... But in a few weeks we are doing a huge overhall which includes a new firewall and certs on our exchange server. then I will be able to use active sync (or something similar) to sync directly with the server.
Edit - I should mention that I tried touchdown