I have included my feed using json feed to show recent posts of my blog on many other blogs.(about 400 blogs).I have a custom domain since first day. When I move to WordPress, is there a where to still work my json feed code, because changing feed code more than 400 blogs is really painful. Also when I move to wordpress it will be cause to decrease my feedburner readers? Please reply soon.
Can you provide more details like sample-codes which you have added to those 400 blogs? Any live URL?
A quick suggestion - have a look at this plugin http://wordpress.org/extend/plugins/json-feed/
It may help you in some way.