I did a bit of a search, but couldn't find any discussion of wheel alignment settings that people use. Anyone up for sharing what alignment settings they use for the street, track, etc? Please also share what model car, and what suspension/wheel/arch mods you've done that may affect what you chose!

At the front:
1 to 2 mm total toe-in is good for the street. 1 to 2 mm total toe-out is good for the track. 
 
At the rear:
For 1990/1991 SW20s with the early rear cross member design, 3 to 4 mm total toe-in is good. The spec in the user manual actually says 4 to 6 mm, so 3 to 4 mm isn't as excessive as it may sound. For later SW20s with the revised rear cross member, you could probably run 1 to 2 mm total toe-in (but I have a 1990 SW20 so I can't say for sure).