Sorry for not posting this earlier - a while back I was actually in touch with the designer of the album (for another web project) - this is his web site: http://www.1618.tv/
Hey Guys,
I actually designed the artwork for Mighty To Save (i found this post when looking through my web stats and found a link to my site from this page). ANYWAY... the font is Avant Garde Gothic and the slanted letters are from an alternate version of that called Avant Garde Alternates.. it's now available at myfonts:
http://new.myfonts.com/fonts/paratype/avant-garde-...
Peace.
Anyone know what font that Hillsong used for the title of Mighty to Save? It seems other churches (Generation) are copying their title too.