I have tried TwitterFeed for a few days and it seems to be great. I like the fact that you could publish your post into a micro-blogging platform, which is why I favour Jaiku from the beginning. It seems more precious to have Jaiku because it is now on invite only, and Google seems to have no idea what they are doing next. I hope it is some nifty new features which will benefit bloggers.
Basically, you could add your feeds to TwitterFeeds using a Open ID login (you may already own one ID). But you will have to expose your Twitter login and password. You could use more than one feeds with one Twitter account. It is another extra way I could publish my post. Although, I will stick with Jaiku on my right panel for now, I am giving Twitter another try. Pownce, another microblogging platform has also open up their registration for all.