I learn specific songs as I desire to play them but I don't put them down in tab form because I always used to think nobody would want to play that stuff anymore. If anyone is interested I can transcribe the following at the drop of a hat, as I know them inside and out. As far as I know these songs aren't tabbed on the internet:
Cirith Ungol - King of the Dead
Lordian Guard - War in Heaven
Brocas Helm - Metallic Fury
Memory Garden - Warlord (http://www.locustleaves.com/Warlord.txt
this one's tabbed actually, for a friend. Don't mind the sarcastic comments, they're not ment for anyone else but him, I'm not encouraging anyone to quit music!)
Sieges Even - Straggler from Atlantis is an ongoing project, I've got the first 3-4 minutes down but it's in the backburner.
Fates Warning - The Apparition (tabs already online are awful)
and I started/will finish Fates Warning - The Sorceress when I have time.
I'll do Fleurety - Fragmenter av en Fortid soon... I think. Or In the Woods... - HEart of the Ages.
If the solo is just improvised scale runs (like Brocas Helm or Cirith Ungol) there's no merit to learn and transcribe it, just play your own. If it's extremely composed and for the glory of God (like Lordian Guard) then yes.
Noisenik, you sat down and transcribed Cynic? Impressive.