HP has announced the date of Tabblo's shutdown: May 30, next week. It's sad, but it's better than continuing to let it rot on the vine.
I've enhanced my Tabblo Lifeboat downloader, it's faster and more robust, and gets a little bit more information from Tabblo.
If you have stuff on Tabblo that you want to keep, get it now. If you need help, let me know.