I just found a blog called Teruah (named after the nine notes in the series of sounds made by the shofar for Rosh Hashanah). Author Jack Zaientz is creating a truly impressive introduction and commentary on the Jewish music scene. His passion for Jewish music ranges from Chasidic to punk rock and he explores all that is happening now in Jewish music. I especially enjoy reading his posts on new Jewish artists infusing diverse music styles with Jewish ruach (spirit), for example, his post on Moshav Band leading Havdalah.
His site is heavily sprinkled with audio and video clips which is oh so wonderful for experiencing the music he is writing about. He has a Radio Widget too, so you can listen to a myriad of internet streamed Jewish music. If you want to keep up with what is happening in Jewish music, in a wide range of styles, check out Teruah.