Via Google Mobile blog
As an engineer on the Gmail for mobile team, I use the Gmail client on my mobile phone all the time. Because of this, I’m always looking for ways to make it faster, more robust and easier to use. Today, we’re thrilled to introduce Gmail for mobile version 2.0 for J2ME-supported and BlackBerry phones. Our focus for this version was to make the experience faster and more reliable. We rearchitected the entire client to push all the processing to the background, greatly improve the client-side caching scheme and optimize every bottleneck piece of code we came across.