I'm playing a dwarf warden in my local RPGA game and they're great fun. 35 HP at first level (without toughness), plus second wind with huge bonuses as a minor action and saving throws galore, is a very fun/tough defender.
I love Thorn Strike, I always yell "Get Over Here" ala Scorpion from MK when it hits... gosh I'm such a nerd
Exactly why I switched up from my rogue to a Warforged Warden!
Case in point: 42 HP at lvl 1, 27 AC after using second wind, getting to yell "GET OVER HERE" while using Thorn Strike (even if yelling that is OOC =P), and getting to say "Nope... I'm not going anywhere" when pushed/pulled/slid while in Form of the Willow Sentinel. Oh... and don't discount the Font of Life class ability of rolling a saving throw at the BEGINING of your turn. *looks at Lord Sessadore* I remember reading about that blindness you guys had to deal with in Echoes of O... that would have come in VERY handy!