Not sure if this is the right forum, but I'm thinking of subscribing to this Kickstarter project:
It looks to do everything I'd want, especially if it's followed up with a phone app.
Roy (Hertfordshire, England)
#1. "RE: Astro time lapse device" | In response to Reply # 0nrothschild Registered since 25th Jul 2004Sat 21-Jul-12 06:35 PM
My comments here assume you are primarily interested in a motorized equatorial mount to track the stars without trailing...
It's hard to talk about your linked item since it is truly vaporware at this point, and in a quick read it does not specifically say anything about astronomical use.
In general, though, if you want to track the stars then traditionally a German Equatorial Mount (GEM) like this would be used. A small one like this (USD $60) would probably work with not too long photo lenses. I have no idea what the payload limit would be, except a good general rule of thumb is to cut the rated weight in half. I just found that in a quick search for inexpensive motorized GEMs.
There is also a smaller device called a "barn door" tracking mount, historically home built but I think some commercial models are out there.
The big problem I see with the item in my link above is that the bottom may not be tapped for a tripod mount. And if I am right on that, then it has to be used on its spindly little table top legs. A point of research. But there are others in the same price range as the item you linked, available here and now and purpose built for astronomical work.
A typical GEM mount is much heavier and bulkier than the item you linked, but there are reasons for that . Since it's going to be aimed at odd angles it needs more robustness than something primarily intended for pano, which would be typically straight and level and the easiest attitude to control on a lightweight mount.
my Nikonians gallery.