Bards also can mezz (although for a stronger mezz you need to invest some points in music, taking them out of regrowth and nuture). This helps a lot when you are taking on mobs that bring a friend. They can cure poison and disease as well. These skills become quite valuable as you take on more complex mobs. Bards are very handy toons and are almost indispensable if you want to complement a solo melee class.
Brick has played with a warden as well. Her heroine and the warden fit very well together and greatly enhanced each other's game play. The major drawback was lack of endurance, which led to some down time. Depending on individual speccing and approach, wardens can take some time to develop as toons, and they start to shine when they are "older." They are a good all around class for someone who wants to play one solo character. Bards, on the other hand, forego offensive skills but are blessed with the ability to make a major contribution to their allies almost from the start of their existence. They can play "over their heads," supporting characters several levels above them.