There is a limit on how much is displayed and a limit on how much can be
copied. For Excel 2003, the display limit is 1024 characters.
Cell can hold 32,767 characters.
Formula bar will display up to 32,767 characters.
Quantro Pro? is Excel's rival. It might be more flexible.
You'll need wrap text turned on (Format - Cells - Alignment tab - Wrap
text). You'll need the row set to Autofit (Format - Row - Autofit). Now
the row height will adjust to the amount of text. If you manually adjust
the row height, autofit will be turned off.
Be aware of the limitations Mike referred to, if you have large amounts of
text. You may need some line-feeds (Alt-Enter) throughout your data if the
text amount is large.