We have a maintenance bird on Jaiku during the migration to appengine :

Hey folks, we'll be right back, don't get your feathers in a ruffle.

http://www.jaiku.com/images/maintenance-bird.gif

Sounds / Looks like twitter for me...

the bird is not new. It was also online when google bought it

[Moved from "Jaiku ported to Google App Engine" – Tony]

The address http://jaiku.com is now redirecting to http://jaiku.appspot.com Is the appspot url temporary?
  
Not all domains is working at the moment, and requires full email address to log in.

http://jyri.jaiku.com said that soon after the porting they are going to announce how Jaiku will be open source.

Jaiku is now called JaikuEngine. Feed fetching and SMS are no longer available, if not anyone develop some plugins to JaikuEngine.

Anyone can set up and run their own JaikuEngine instance on Google App Engine. Jaiku Mobile client is also open sourced.
http://jaikido.blogspot.com/2009/03/jaikuengine-is-now-open-source.html
http://code.google.com/p/jaikuengine/

http://jyri.jaiku.com/presence/f5949912bbff419089c153cf8ff737fe

There is a title typo too: old fashionned ??

[moved "JaikuEngine released as open source project" ~hebbet]
http://blogs.zdnet.com/Google/?p=1321

"Jaiku is a competing (well not really) service to Twitter — it’s not nearly as popular, and that’s the reason Google has decided to release it as an open source project for the community to develop.

JaikuEngine — the new open source project –is different from Jaiku in a couple of ways, but for the most part it’s identical.
...."

pointing to source http://jaikido.blogspot.com/2009/03/jaiku-is-becoming-jaikuengine.html