According to the article, plans were made to show HBP on ABC Family back in March 2010. ABC Family to air Harry Potter and the Half-Blood Prince in Late 2011
We're in a very slow news period. So much so, we've been forced to post this very trivial story. Variety is reporting that ABC Family will be airing Harry Potter and the Half-Blood Prince in late 2011: Deal continues a relationship between ABC Family and Warner Bros. Domestic TV Distribution, which sold the title to the channel. ABC Family also has the rights to the first six "Harry Potter" features, via WBDTD, with "Harry Potter and the Half-Blood Prince" set to air in late 2011. Read more at this link. Thanks to Daniel for the tip!