There are a handful of beats preprogrammed in DM1 spanning a couple different styles, but probably not enough to make it something you'd use if you don't want to program at all. However, it's pretty easy to program beats in DM1, it's set up on a grid and you just light up the squares. (Pic below) You can save your beats too. If you feel like digging in further, you can program different patterns within each beat, and there's a sequencer where you can program the different patterns into a song. There are also import/export options if you feel like sharing or backing up to Dropbox. The secret sauce with DM1 is the Swing slider... It took me a minute to figure it out, I wanted to do a shuffle beat and didn't think it could do it until I found that slider, which isn't on the beat programming page for some reason.
I've never heard of that Beat Buddy thing before today, but it seems like it might be something pretty close to what you're looking for. I could definitely see the benefit to having something like that in a pedal form as well. It's cool that they're doing a Kickstarter campaign for it, but it looks like the Beat Buddy is at least 7-8 months out, if it even happens. (delta's vaporware reference)
I just thought of another option that might be worth checking out... EZDrummer from Toontrack. It's a loop based PC program, so you wouldn't be able to take it with you, but for just practicing at home, it might be the ticket. I used it a while back for some scratch idea track stuff, sounds pretty good.
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Oooo, there's also the Boss RC2 that might be something you'd dig... Boss's smallest phrase sampler, and it has some beats programmed in as well. Phrase samplers are cool because they'll improve both your time AND creativity/improvisation.
NOTHING beats jamming with live musicians though... Just sayin'.
5sg.