All system logs are located in a hidden folder called private.
Here is the full path:
/private/var/log/system.log
To get to this folder in the Finder:
1. Click on the "Go" menu, select "Go To Folder..." or press [Command-~].
2. In the window that pops up, type /var/log/.
3. A new window will open on the desktop that has ALL system logs for everything, ftp.log, daily.out, mail.log, system.log, etc...
4. These are standard TEXT files, and can be quite large. You can open them in TextEdit or BBEdit, or your favorite word processor of choice.
5. Also in this folder are compressed archives / backups of previous logs using the "gz" compression scheme. To look at these files, just drop their icon on top of Stuffit Expander or double click on them.
6. You can configure the Console to launch and display a status window whenever a program crashes. To me it contains a lot of giberish, but it lets me know which program crashed.
Enjoy!
Incidentally, this was how I learned that someone tried hacking into my system 4X, unsuccessfully.