Mailbox, the e-mail client from Dropbox typically restricted to mobile, is coming to desktops with a brand new Mac app. It's still in a closed public beta format for which you'll need to request a "betacoin" to access, but it's looking good already. If you already signed up on the waiting list, check your inbox.
The Mailbox beta includes support for drafts, so unfinished messages are stored locally and eventually will sync across devices. There's also a "snooze to desktop" feature live that will let you shunt messages to your computer that you don't have time to answer on your mobile device. The interface looks very polished as is, and we're eager to see how the product evolves.
Anyone eager to sign up for the Mailbox for Mac beta can get started here. Are any of you guys using Mailbox for iPhone or iPad? Is your current desktop e-mail client ripe for a replacement?