If somebody has already made a suggestion, I'd like to find it and add my vote. If I'm the receiving company, I'd rather have fewer suggestions with more votes than have to figure out which suggestions might relate. I might even like to be able to combine or link suggestions using the search tool... even if it's just behind the scenes.

It shows me when I have new messages, but when I click on them it just brings me to all my suggestions. Either only show me only the suggestions with messages, or make the message icons/text stand out differently.

SuggestionBox.com on promotional products, at tradeshow giveaways, or on corporate gifts and apparel would help your site really reach the masses.