There are several bands named Boomerang:
1) A 1970's Progressive/Blues band from the USA.
2) An Uruguayan pop/rock band.
3) A jazz fusion group from Kazahkstan.
4) A power metal band from Germany founded in 1996.
6) A new wave/pop trio.
7) A rock band from Surabaya, Indonesia.
1) Boomerang was a Heavy Progressive Blues Rock band from the USA. It was formed in 1970 by Mark Stein, organist & vocalist, formerly from Vanilla Fudge.

Read more about Boomerang on Last.fm.