Not sure if its better to go with having the brand name there or not. I think its cooler with just cloudy, but runs the risk of no one knowing who its from....
It's been done: <a href="http://naldzgraphics.net/inspirations/30-cottony-and-fluffy-cloud-logo-designs/" rel="nofollow">http://naldzgraphics.net/inspirations/30-cottony-and-fluffy-...</a> also iCloud and related.