su.pr and it's a life saver. It shortens URL as well as lets you schedule your tweets and Facebook updates at the same time. It limits the number of characters to 140 however since that's the limit on tweeter. Not only does it schedule as many tweets as you would like at the times you would like, it also lets you see how many people clicked on it within the first 15 minutes. This lets me figure out once are most popular and how to write better quality tweets. I highly recommend it, it's great.
For your viewing pleasure I posted one of my small paintings from Ancestor Spirit collection. I'll be giving it away some time soon. Will post here once it's up for grabs. Have I ever mentioned how much fun those giveaways are? That's what I've been tweeting about all evening, what giveaways I found and how much I love them btw.