Very long urls in the list view gadget make it difficult to use.
After a frustrating attempt to have scroll bars in cells containing very long links, I learned that browsers can be hinted about inserting line breaks in texts that do not have blanks, by means of "zero width spaces" or the non-standard <wbr> tag. Line breaks are probably more usable (and definitely more printer friendly)
See http://www.quirksmode.org/oddsandends/wbr.html for annoying browser uncompatibilities
Maybe the same thing could be applied to displayMessage(), or even for regular external links.