The band name Heaven And Hell comes from the first album they did together as Black Sabbath in 1980. They did a few albums and tours together in an on again off again relationship from 1980 - 1982 and 1991-1992. If they manage to release a studio CD album of new material this year, it will be the first time in over 15 years.
Personally, I much prefer the original Black Sabbath lineup formed in the late 1960's with Ozzy Osbourne on lead vocals and Bill Ward on drums. They've had many member changes from time to time, and I've liked them all. But, the first lineup, which stayed in tact until 1979 was definitely best. I was lucky enough to see most of the different versions of the band live, including the "Reunion" tour with Ozzy and Bill when they were in Columbia, MD at Merriweather Post Pavilion August 14, 1999.
I look forward to the new release later this year. Don't expect Heaven And Hell to tour in 2008 like some are saying. It's more likely to happen in early 2009. The rumor that Judas Priest will tour with them seems unlikely, as they start a world tour soon. Whenever it happens, I'd like to make it to this reunion tour as well.