To commemorate the arrival of the third add-on scenario, "A Shantotto Ascension", Square Enix is announcing that those loyal fans who have purchased all three add-on scenarios will be able to receive a new gift. The Nexus Cape, capable of teleporting a potentially straggling adventurer to their party leader's location, will be available from the treasure coffer in Lower Jeuno's Tenshodo Headquarters.

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From Playonline.com:

To commemorate the release of the third and final add-on scenario, we are proud to introduce the "Nexus Cape," an in-game bonus item for players who have purchased the entire trilogy. All characters under a single player account registered for all three add-ons will be eligible for this gift.
Owners of the FINAL FANTASY XI ULTIMATE COLLECTION, scheduled for release on November 10, can also shout with glee, as the gift will be available to them also.

Following the release of the next version update, eligible characters may collect their Nexus Cape from the treasure coffer located within the Tenshodo Headquarters in Lower Jeuno.

The Nexus Cape is an enchanted item that allows characters in a party to teleport to their party leader's location. Please note, however, that the enchantment's effectiveness is limited to certain destinations only. Provided that all requisite conditions are fulfilled, characters may teleport to the areas listed below:

Uleguerand Range / Attohwa Chasm / West Ronfaure / East Ronfaure / La Theine Plateau / Valkurm Dunes / Jugner Forest / Batallia Downs / North Gustaberg / South Gustaberg / Konschtat Highlands / Pashhow Marshlands / Rolanberry Fields / Beaucedine Glacier / Xarcabard / Cape Teriggan / Eastern Altepa Desert / West Sarutabaruta / East Sarutabaruta / Tahrongi Canyon / Buburimu Peninsula / Meriphataud Mountains / Sauromugue Champaign / Yuhtunga Jungle / Yhoator Jungle / Western Altepa Desert / Qufim Island / Behemoth's Dominion / Valley of Sorrows / Southern San d'Oria / Northern San d'Oria / Port San d'Oria / Bastok Mines / Bastok Markets / Port Bastok / Windurst Waters / Windurst Walls / Port Windurst / Windurst Woods / Ru'Lude Gardens / Upper Jeuno / Lower Jeuno / Port Jeuno / Rabao / Selbina / Mhaura / Kazham / Norg

The enchantment effect will differ slightly depending upon the party leader's current location: field areas or towns. For field areas, users will be sent directly to where their party leader stands, while for towns, they will be teleported to where a home point may be set.
Bring a Nexus Cape with you on your adventures, and you need not fear being left behind by your comrades ever again!

*The teleportation will be rendered ineffective if the party leader changes areas in the middle of casting. It is recommended that party members communicate their intent to teleport beforehand.
*Characters may teleport only to areas they have previously visited.
*Teleporting to areas introduced in expansions is possible only after installation and code registration have been completed for the expansion pack in question. This does not, however, affect one's eligibility to obtain the Nexus Cape.