Thanks for a great plugin.
Easy to use, customise and a great way to promote your site socially.
The only issue I have is not being able to set the page in the url shortner for the competition. If you have a competition page and you want to use the widget then you need to make sure you are the first entry and you make the entry from the competition page.
If you use the widget without doing this then whoever enters the competition first will set the destination page as being the one that they were on rather than the competition page itself.
But this is just a small issue on generally a really good plugin.