You may want to consider setting the database's default character for new tables going forward using ALTER DATABASE. Here is an example using MySQL 5.5.12 for Windows:
mysql> show create database example;
+----------+--------------------------------------------------------------------+
| Database | Create Database |
+----------+--------------------------------------------------------------------+
| example | CREATE DATABASE `example` /*!40100 DEFAULT CHARACTER SET latin1 */ |
+----------+--------------------------------------------------------------------+
1 row in set (0.00 sec)
mysql> alter database example default character set utf8;
Query OK, 1 row affected (0.01 sec)
mysql> show create database example;
+----------+------------------------------------------------------------------+
| Database | Create Database |
+----------+------------------------------------------------------------------+
| example | CREATE DATABASE `example` /*!40100 DEFAULT CHARACTER SET utf8 */ |
+----------+------------------------------------------------------------------+
1 row in set (0.00 sec)
Give it a Try !!!