I know which readily-available beers are vegan suitable, but wine floods the marketplace in such a way that it seems every restaurant, pub and bar has a different wine list, rendering it nearly impossible to know if what I'm ordering is filtered with milk or through isinglass. The situation is a lot easier at the bottle shop - I usually just go in and grab a bottle of Yalumba. The awesome people at Yalumba label the wines in their range as to whether they are vegetarian suitable and vegan suitable - my favourite is the shiraz-viognier. If a label says "vegan" (or a restaurant has the word "vegan" on their menu!) I know that business cares about me, and I am more likely to support them. (Even if the company has really cheesy ads that I inevitably have to sit through at least 20 times each year at MIFF!)
If anyone has some suggestions for other Australian wines that label their product as "Vegan Suitable", I would love to hear about them!