Slogan plugin

[Tyblitz]

hardly an 'expert' here, lol, but something like this, perhaps?

PHP Code:

<?php if(function_exists('get_slogan') && get_slogan('Announcement')) {
echo '<div>' . get_slogan('Announcement') . '</div>';
}?>

Almost there: 

PHP Code:

<?php if(function_exists('return_slogan') && return_slogan('Announcement')) {
  // will evaluate to TRUE if Announcement's text length > 0
  echo '<div>' . return_slogan('Announcement') . '</div>';
  // or: echo '<div>'; get_slogan('Announcement'); echo '</div>';
}?>

The author of Slogans plugin didn't include a second $echo parameter in the get_slogan function (but that's fine, you can use return_slogan)
JFYI (& shameless self-promoting), you can also do this & more with Gs Custom Settings (although not I18n-enabled yet)