Hello, Those of you who use Exchange on your iphone, do you find it pretty reliable? I currently use a Blackberry with BES service. I like the two-way sync for mail (all folders) and calendar. I understand that with the iphone, my tasks and notes wouldn't sync but that's fine. Some quick questions: 1) Do you find Exchange on the iphone pretty reliable? Are emails are pushed to the phone almost instantly. 2) My understanding was all mail accounts have the same signature. Does this include Exchange accounts as well? If I have an Exchange account and a Gmail account set up on my iphone, can I have a sig for just the exchange account? 3) If I send an email from my computer (with the Exchange account's address) will it show up on my iphone in the Sent Messages? Thanks in advance.