Easiest way for i230

[kattzkitti]

Tomestones of Lore can purchase i230 gear for all slots.
You can get an i235/i255 weapon from Palace of the Dead.
PvP has full sets of i235 gear.
Level 60 dungeons can give up to i245 gear for all slots except weapon.

A word of advice since you imply your goal is to gear up in preparation for 4.x as fast as possible. Go the PvP path, as once you have your full set of PvP i235 gear, you can just head straight into the Dun Scaith raid, which will upgrade your left-side gear to i260 and also has a weekly quest for i270 right-side gear. You'll still need to obtain a weapon from some other source though. Palace of the Dead is easy i255, Zurvan Extreme gives i265, or Tomestones of Scripture for i260 that can be upgraded to i270.