So, the rumor circulating the web that discovery ends at 400 crafting is entirely false. In fact, some recipes can't be discovered UNTIL you've reached 400 in crafting. Last night I began working on a set of Intricate Armor for armorsmithing. It's a sweet looking heavy armor set called Gladiator (Tier 2.) I made three pieces and it's absolutely stunning looking armor. Intricate Armor requires a lot of uncommon crafting materials, for example 15 small scales, small venom sacs, small totems or small claws for each Insignia. I spent hours farming last night and did some WvWvW, where yes, the karma did flood in. I made 1200 karma in like 20 minutes of playing. Completing events awards almost 800 at a time.
Once you get the hang of crafting, it becomes insanely fun. Armorsmithing is seriously rewarding and the armor you craft is great.
I also ran my first dungeon, CM in Queensdale. My first group got annihilated on the first boss, while my second group, composed of guildies, tore through the dungeon. It was really fun.