No luck with bingodisk for me unfortunately - but all my calendar and contacts currently come from our Windows 2003 / Exchange server so maybe that's interfering.
Would like to hear if anyone has got it working on bingodisk - I used
user@bingodisk.com format for username and the standard disk-mounting password.
Also tried adding it manually in iPhone settings by adding a new email account, and just choosing the "Other" email account, then putting details into "Add Subscribed Calendar" in format
http://user.bingodisk.com/bingo/DueSoon.ics