Daniel Whitcomb at WoW.com has posted a guide to gearing your brand new level 80 DPS Death Knight. The top of the article has links to great guides on speccing for Blood, Frost and Unholy as well as previously published DK gear guides. The rest of the piece looks at the best in slot gear depending on what kind of end game encounters you're running. This guide should be good until Cataclysm class changes drop. Current as of WoW patch 3.3.3.
[DK DPS] Gear guide for new level 80 DPS Death Knights
The basics of the Unholy DPS DK spec
Daniel Whitcomb of WoW.com continues his series of beginner guides for Death Knight specs, this time covering the Unholy DPS spec. He covers the strengths and weaknesses of the spec, reviews the recommended talent build, lists the stats to look for on gear, and includes leveling advice, best dps rotation, glyphs, gems and enchants.
The basics of the Blood DPS DK spec
Daniel Whitcomb of WoW.com has posted a basics guide for Blood spec Death Knights with an emphasis on DPS. His Blood 101 piece covers the pros and cons of the spec, what stats to look for in gear, talent builds and leveling, damage rotations, glyphs, enchants and gems.
Icecrown Citadel Crimson Hall gear guide for Death Knights
Daniel Whitcomb at WoW.com continues his DK gear guides for Frostwing Halls, this time focusing on DPS and Tank gear for The Crimson Halls. He covers both 10-man and 25-man DK drops from the Blood Princes and Blood Queen, Lana'thel.
Icecrown Citadel Plagueworks gear guide for Death Knights
Daniel Whitcomb, the Death Knight columnist at WoW.com continues his ICC DK gear guide, this time focusing on drops in the Plagueworks. He covers DPS and tank gear from Festergut, Rotface and Professor Putricide in both 10 and 25-man encounters.
Icecrown Citadel Lower Spire gear guide for Death Knights
Daniel Whitcomb, the DK columnist at WoW.com, has listed all the 10-man and 25-man gear that drops for Death Knights in ICC: The Lower Spire. His list includes all the bosses and covers both DPS and Tanking gear.
Emblem of Frost gear guide for Death Knights
Daniel Whitcomb at WoW.com has posted his gear guide for Death Knights collecting Emblems of Frost from Icecrown Citadel and random heroics. He covers T9, T10, non-tier plate, sigils and cloaks.
Death Knight best in slot gear list for Patch 3.3
The Typhoon Andrew DK blog has compiled a best in slot list of gear that can be bought with Emblems of Frost. He covers both DPS and tank death knight gear as well as drops from the Argent Tournament and Ulduar.
Death Knight sigil upgrades and progression
The Chill of the Grave blog has posted a guide explaining what Sigils are available to Death Knights. They cover the earliest quest reward Sigil through the ones that can be purchased with Emblems of Triumph and Frost. Also, PvP Sigils are briefly touched on.
Death Knight gear drops in Frozen Halls
Chill of the Grave Death Knight blog site has a two part series on gear drops for DK's in the Patch 3.3's 5-man runs. It includes drops from Forge of Souls, Pit of Saron and Halls of Reflection: