FeedBlitz is one of the most popular RSS services that bloggers are migrating to in order to replace Feedburner. If you're thinking of migrating your feed to FeedBlitz from Feedburner, there are 10 things you should know about moving to FeedBlitz to ensure the migration goes smoothly and without any surprises. Follow the preceding link for all of the details.
For example, you might lose some subscribers when you move to FeedBlitz and you might need to pay a fee if you want FeedBlitz to handle your feed's email subscriptions. FeedBlitz is one of the best alternatives to Feedburner, but you need to educate yourself before you make a move to another provider.