- go to my Yahoo pipe
- add your broken Blogger comment feed url to the input box, e.g. http://dlinsin.blogspot.com/feeds/comments/default and hit "Run Pipe"
- the result is a pimped version of your broken feed, that you can use instead of the original feed. With a click on "More options" you can get the url of the feed, e.g. http://pipes.yahoo.com/pipes/pipe.run?_id=
I hope this helps to as long as the Blogger feed is still broken.