I've been here 6 months now and have met loads of people through Meetup.com
It's basically a site where people start groups up with like-minded people with particular interests or geographical areas - there are professional and business MeetUp's, social get togethers, singles MeetUps, etc. and pretty much everyone who turns up to the events is in the same boat as you, starting fresh in a new place and wanting to meet new people. There are the obligatory few socially inept weirdo's looking for a wife but generally the people are ok!! And as you're in a group, you can decide if it's your cup of tea when you get there and make your excuses if it's not your thing, there's no pressure. Generally though I've enjoyed the ones I've been to here in Sydney and have kept in touch with some of the people I've met.