These Errors are common when new tools are released, due to a overflow of new and old users trying to access the server and also developers updating and testing the new tool. Just be patient they will go away eventually.
Happening again a lot today. It would be useful if they included something with errors to tell you that there's nothing wrong with your device and that it's do with cydia and their servers.
Wirelessly posted (Mozilla/5.0 (iPhone; CPU iPhone OS 5_0_1 like Mac OS X) AppleWebKit/534.46 (KHTML, like Gecko) Version/5.1 Mobile/9A405 Safari/7534.48.3)
There is nothing wrong with your device, it's the servers....
Wirelessly posted (Mozilla/5.0 (iPhone; CPU iPhone OS 5_0_1 like Mac OS X) AppleWebKit/534.46 (KHTML, like Gecko) Version/5.1 Mobile/9A405 Safari/7534.48.3)
There is nothing wrong with your device, it's the servers....