Hi,
Great plugin, but could you change the way the tweets are sent so they use Twitter’s own t.co domain by default?
That would help with some particularly long URLs, and increase the chance the visitor actually sends the tweet (so (s)he doesn’t have to worry about the character limit).
To use it the link should look like this:
http://twitter.com/share?url=[URL]&text=[text]&source=[plugin name]