On one of my next attempts, importing my del.icio.us bookmarks to BlinkList worked. 
My BlinkList can now be found at http://www.blinklist.com/josschuurmans/.
Somewhat related on www.josschuurmans.com:
- "Fatal error" importing to BlinkList (February 17, 2006)
- How does BlinkList compare to del.icio.us, really? (February 10, 2006)
- Observations about (social) bookmarking (February 9, 2006)
Technorati Tags: BlinkList, del.icio.us, social bookmarking
del.icio.us is a good idea which blinklist.com does much, much better.