Does any one have an experience of running these on your blog? I was wondering about doing one (and have ideas!) as I thought they might be fun and may increase traffic but was also wondering - are they lots of hard work? Do they really 'drive traffic' - I'm still very much a newbee blogger (2.5 months months 3400+ page views). If you run a 'giveaway' are any there legal issues??? Any experience or advice welcome...