Hotmail has shut down access to mail through a mobile browser via m.mail.live.com, a service that we told you about when it debuted in February.  According to a short post on the Hotmail team blog, the service is undergoing maintenance and they “will bring back the service shortly once maintenance has been completed”.  Attempts to reach the service are greeted with

Hotmail

There’s a temporary problem with the service.  Please try again later

We’ll keep an eye on it and let you know when service returns.

UPDATE: Well that didn't take long.  We were just alerted to an update to the blog post:

We have completed maintenance on Hotmail’s mobile browse service in the majority of geographies. For the few remaining customers we are working to bring the service back in the near future.