Before if you had an MSDN Universal or Premium subscription, you could only get 25 hours per month of Azure for free.
That’s certainly enough to test your apps out and get a feel for what it’s all about. But now there is the new "extra small compute instance", they have decided to enhance the offer by adding 750 hours (there are 744 hours in a month so you can run an app 24 hours/day in a XS instance for free) of it to the existing offer.
If you like to sign up for the free offer (it runs out on the 30th June 2011) click here.
what you get now is:
* 750 hours of an Extra Small Compute Instance
* 25 hours of a Small Compute Instance
* 10k Storage transactions
* 500MB in / 500MB out
* 1GB Web Edition SQLAzure database (for 90 days only)
Access Control transactions:
Service Bus connections: