Provide https on *.cloudapp.net apps/services
At the moment an app running with as a sub-domain of cloudapp.net cannot use https for passing passwords or other secure info. It would be very cool if Microsoft provided a SSL certificate which was valid for all *.cloudapp.net URLs.
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Tarun S commented
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This would provide for a security hole in the system. You can't trust any other subdomain at cloudapp.net any more than you trust any other random website. It's most secure for you to map your own custom domain or subdomain to your *.cloudapp.net url and then install your own SSL certificate for your site to use.