I’m sorry I missed this when it came out in September.  Here’s an article from Telephony (via ICB Toll Free News) regarding the practice of mis-spelled toll free numbers (as in 1-800-OPERATER instead of 1-800-OPERATOR).

Here was a strange Sixth Circuit case  from 1996 in which Holiday Inn, owner of 1-800-HOLIDAY was not able to prevent the use of 1-800-H0LIDAY (that’s a zero).