In the "New GUI (2011)" dashboard, one simply logs in and looks for the "Deleted Blogs" button - right beneath "New Blog", when the blog owner has any self deleted blogs, or any blogs deleted or locked by the Blogger spam classifier. Clicking on "Deleted Blogs", we see a list of blogs - with either an "Un delete" button (for self deleted blogs), or a "Restore" button (for spam classifier locked / deleted blogs).
Neither the "Restore" or "Undelete" button produce an immediate or universal result - both are still subject to previous limitations.
- The "Restore" button leads to the "Review Request" dialogue - and to the actual spam review - still subject to the opinion of Blogger / Google spam experts.
- The effect of the "Un delete" button is limited to blogs which can be un deleted.
It is simply now far easier to find the spam review / un delete mechanism, than it was under the previous GUI.
If your blog was deleted by you - or deleted by Blogger for hosting malware, you should be able to hit "Restore", and the blog will be restored while you wait. If the blog was deleted or locked by Blogger for suspected spam hosting, you will probably have to solve a CAPTCHA - then wait 24 to 48 hours, while the blog is reviewed. In the long run, you will probably find this extra effort will be worth your time.
In some cases, the owning Blogger account may be locked, following unusual account activity - generally, brute force password guessing attempts, in an effort to hijack control of the account and any owned blogs. After submitting an account restore request and / or changing the account password, the blogs owned by the account will be restored - generally 24 to 48 hours after the account is restored.
Just be aware that not all blogs will be listed by the "Deleted Blogs" wizard.