prolly figured it out by now...you have to click the message and go to the next screen to follow the link AND it does not open a new window so don't close out when yer done. Back.
...add your twitter feed via rss, just select add feed in jaiku and enter your twitter address, it will display your feed choices for you. I selected mine only not me + friends. Then when you post to twitter it shows up in Jaiku with a little favicon.