Mixlr's best use may be its Facebook embed, if you have a large Facebook following. Note that your Mixlr stream is also available on iPhones and Androids.

If you have an issue with Mixlr, contact them on Twitter (@mixlr) or by email (mixlr@mixlr.com). The owners are very responsive to customer issues.

While the service is free, you can get some extra capabilities and higher bandwidth with a paid subscription, which is about $8US per month. It's good to support them to make sure they can hang around.