A: 

Check out the tableView:titleForFooterInSection: method of UITableViewDataSource. You can return a string to be displayed below a table view section. If you're already using a UITableViewController subclass, just implement that method and you're good to go.

Alex
Thanks for your reply. I should have pointed out more clearly that I want this to be in the iPhone-App settings that are in the Settings menu of the iPhone (outside the App).I bet there is no way to achieve this there…?
Markus
A: 

Try using a PSTitleValueSpecifier in your settings bundle's plist. I'm not sure how that formats itself—most likely bold, like the group headers—but it might be what you're looking for.

Noah Witherspoon
Unfortunately it looks like a setting - just one you cant edit. Looks like I'm out of luck with my labels…Thanks anyway!
Markus
+1  A: 
hjon
Thanks. That's what I also tried. Unfortunately it looks not that "elegant"… Nevertheless, thank you for your answer!
Markus
No problem. I thought I ought to add it for future reference, just in case it's suitable for someone else. :-)
hjon