If you haven't already you must hear Opeth's other album with Steve Wilson, Blackwater Park. I'ts thoroughly excellent, a great prog-metal album. I did have the pleasure of bumping into his solo album, which of course is on a completely different style, I'll definitely be buying the CD when I get around to it, hopefully the special edition, I like the tracks on disc2 very much.
Another one of his projects I've gotten into late it Blackfield, not really prog but has a great feel to it and I'll be listening to that for years to come, haven't digested the first album long enough to delve into the second, but I'm looking forward to purchasing both.