We sometimes need
This idea has been merged with Ability to have Multiple Lines in Legend for one feature.
to split Legend items
Across multiple lines...
The ability to insert a carriage return and/or a line feed into a layer name so that it can appear on multiple lines on the legend is so basic, so fundamentally necessary, I think it should be added to ArcGIS 10. For years, I've used the Multiline Legend tools ArcScript. However, with, ArcGIS 10, this tool is broken.
ArcGIS should allow this natively, without the need for a 3rd party extension.