According to the Hollywood Reporter, "Harry Potter and the Half-Blood Prince" has easily ascended to the weekend's boxoffice throne.  The PG-rated Warners release, which exploded onto the scene with a record $22.2 million worth of midnight screening coin Wednesday, took in an additional estimated $26.8 million Friday from 4,325 theaters. That brings its total domestic coin to about $107 million after its first three days. Prince," which has lost a little momentum in the wake of its fans' initial rush to the boxoffice, is on track to enjoy the best first five days of any Potter movie, outdistancing "Harry Potter and the Order of the Phoenix," which took in $139.7 in its first five days in 2007. At the moment, though, it's not in a position to challenge five-day boxoffice record-holders such as "The Dark Knight" and "Transformers: Revenge of the Fallen." Look for more requests for magicians at library's and birthday parties across the USA.. we hope.