Android and Gmail should work very well together considering they have the same parent. For the most part Android and Google play well together, but like most things, there is always room for improvement.
Google has announced some improvements for the web-based version of Gmail for the Android and iPhone platforms reports InformationWeek. The biggest of the improvements is faster address auto-completion. That means you have to type less characters before finding possible contacts, which is always nice.
Auto-completion allows you to begin typing an address and Gmail will predict which of you contacts you want to email and enter the address for you. The second improvement is specifically for Android devices with keyboards like the G1. Keyboard equipped devices will now have access to keyboard shortcuts.