[Joel]

If you add a line label to the line (Option-double-click is the default in version 5), and then add a line length variable in that label (via the Edit Menu -> Insert Variable, or <%Length%>), you can get the length of the line.

Angle will be much harder as the angle of the line is set to zero degrees on creation of the line, so unless you make it perfectly horizontal or vertical using the Shift key when you create it, the Geometry Inspector won't give an absolute result.

Also, lines connecting shapes are more or less "immune" to the Geometry Inspector, so please keep that in mind.

Hope that helps,