The first Saturday in May is Free Comic Book day, when participating retailers offer a free copy of selected titles as a comics-boosting measure. And while the initiative is pretty US-centric, Australian retailers are taking part on May 2.
The search engine on the official site reveals that stores in every state and territory (except the NT) are participating -- the perfect chance to get back into comics at no cost. Exactly which title you'll score for free varies from location to location. If you'd rather be writing your own comics, check out previously mentioned StripGenerator.