Blogging from TornadoCamp.net (just finished the introductory keynote -- CLR; JIT, GC, etc.)
A few comments on Tomas' wishlist...
In general, I would say, however, that good use-cases for CLB are fairly rare. Only if you are seeing a huge variation in processing times (eg. user-supplied ad-hoc queries against a data store), CLB is a better tool than load-balancing on the user-tier and bind groups of user-tier servers to dedicated backend servers.