Bukkit

Version 3: February 11, 2013

Added

• Tab completion for many commands.
• wand-range configuration option, defaults to 256 blocks.
• abyss.command.teleport_other permission for teleporting other players with the Teleport command.
• Portal modifier indices to the Information command's output.
• The Utility command for moving a portal modifier's Utility Block.

Fixed

• Entity position upon teleporting is now properly offset for the new portal rotation.
• The Modifier command can now be used as a regular command.
• The Portal Wand can be used beyond the range a player may normally click a block.
• Players must have the abyss.use permission to modify portals.
• Right-clicking with a Portal Wand takes precedent over right-clicking a portal's item frames.

API

• Added: getNear(Location location, double range) to get all portals in a 2*range cube around location.
• Fixed: Portal Wand logic is now in the ABCommand class where it belongs.

Version 2: Initial release on dev.bukkit.org.

Added

• A command system.
• Entities can now travel to other worlds through portals.
• entity-type-whitelist configuration option, for controlling which entities
  can travel through portals to other worlds.

Version 1: Initial release.

• No changes.

I haven't had the opportunity to do any performance testing on large servers yet, and no long term testing for memory leaks and the such has been performed.

There's currently no way for a normal player to get a portal wand, though they can use wands after they've been given them.

Frames aren't limited to any specific material right now, and there's no way to configure frames at all, aside from the overall portal size.

There's currently no configuration options for controlling inter-world portals.