Tuscany Market in northwest Austin is having a wine tasting event this Saturday (April 2nd) at 3pm. I went to a few of these when they first started doing them last year, but haven't been in awhile. It seemed that they were typically overrun with people in a cramped space and it was pretty difficult to fight your way up to get a tasting. Generally, I've had a better experience going for the weekly Friday night tasting at Grapevine Market, in north Austin. They almost always have something interesting to taste at an affordable price. I think they also do them Saturday afternoon, but that's usually out of my way on Saturday.