TCP/IP, SMTP, HTML, WYSIWYG. The tech community has a habit of picking really dry and, perhaps, boring names for technologies. Bluetooth is a notable exception.
So where does the name, and the ubiquitous symbol (left) come from? Well, Bluetooth is actually named after Harald Bluetooth Gormson. He was a Danish king who live around 1900 years ago. He is credited with unifying tribes from around Denmark, Sweden (where Bluetooth was invented) and Norway. Bluetooth was decided on as a metaphor for how the radio transfer protocol was originally intended to unify disparate technologies.
The Bluetooth logo combines the Nordic runes of H and B.
You learn something new every day...
PS: This post inspired by this item on ThinkGeek. I couldn't find any reliable source to confirm that the Bluetooth moniker was actually given to King Harald due to his love for blueberries...