An interesting and ambitious idea... combining Interview with the Vampire and The Vampire Lestat into a chronological story. I have no idea where I was the past several years while Elton John was thinking this up, producing and premiering it on stage in San Francisco... and I have even less of an idea what to say about it, other than the guys playing Louis and Lestat are pretty hot and apparently, for no reason readily apparent to me, Marius, a character who is supposed to be of an old Roman senatorial family, long enshrined on the Palatine Hill, has become a black man in the musical and the relationship between Lestat and his mother, Gabrielle, is even more obviously incestuous. Sorry for the run-on sentence, but hopefully it's still readable.
The official site: http://www.lestat.com/
A really well-written review can be found here.