The instant messaging research keeps on coming. Today, we learn of a European study that reveals companies are not implementing enterprise instant messaging solutions. Despite recognition of the need to manage instant messaging, 56% of the 340 European IT managers have no plans to install enterprise IM, opting instead to let employees use the AOL, Yahoo and MSN software. Many of those surveyed say they don’t mind, since they’ve found security tools that let them use these tools safely.