It is still up, serviced as P2P.
Currently, the game is up to Turtle Islands episode (the one before 2-2 classes and Juno update). There are 3 servers - Chaos (or Keias as I'd rather call), Loki, and Sakray (x2 exp/drops).
iRO does a lot of little events, and most of the loading screens are the works of iRO players.
There has not been another major security breach for a while, and game has been receiving major update every month and a half.
Order of update listing:
kRO > jRO / cRO > mRO / tRO > iRO > every other RO
The difference are in single episodes - kRO is currently on Episode 6 (localized maps), jRO/cRO Episode 5/6 (localized maps / Juno / 2-2 class update), mRO/tRO Episode 5 (Juno / 2-2 class update), and of course... iRO on Episode 4 (Turtle Island / Guild Siege (which is supposed to come soon)).
For further information, feel free to ask / post.
<-- still playing RO, and runs kRO patch informational site.