I was just surfing Youtube and found a great video from the awesome Nicole Dean of EasyPLR.com. She is talking about how to use joint venture giveaways to build your business. I know that my Ultimate Blog Challenge co-host Michelle Shaeffer hosts a Christmas joint venture giveaway around the end of the year.
Remember that if you decide to host a joint venture giveaway that it is important that the giveaways are geared towards your target market. Also if you participate in someone elses giveaway I suggest that you do your best to get on the top of the list of giveaways. Sometimes these giveaways have 100's of participants and you don't want to be towards the bottom of the list because most people don't go through the whole list.