World of Raids has been releasing information by the bucket loads, and one intriguing little morsel has caught our eye: The addition of four new bag types, marked "Leatherworking Supplies," "Soulbound Equipment," "Vanity Pets," and a fourth one simply marked "Unused."

Almost any vanity pet fanatic will tell you that one of the hardest things to do is deciding what to delete to make room for your newest little friend, or which pet to take out of the bank and parade about when heading out to quest, grind, or raid. The idea of making vanity pets easier to store and carry has been one that's been a perennial topic of the suggestion boards and an issue dear to the hearts of every pet fanatic who's set up elaborate trade agreements with the other faction or spent countless hours in Zangarmarsh just to make sure they got ALL the vanity pets possible, and it looks as if Blizzard has finally answered their prayers.

The leatherworking supplies bag is a bit harder to pin down. We already have a leatherworking bag category, so this may be simply a shuffling of data.

As far as a soulbound items bag goes, if it simply allows any type of soulbound item or gear, and comes in sizes greater than the current 18 slot standard, this could be great salvation for any class who carries around an extra set of gear for various situations, be they a Druid with tank, DPS, and healing sets, or a raider with various resist sets.

Of course, we can't say for sure yet if these new categories will be used right away for Sunwell loot or recipes, or whether they're simply in reserve for possible future use, but the prospect of more bag space has this druid drooling.

Your friendly neighborhood mailbox has many uses. More than just sending messages to offline friends, it also doubles as a second bank. Mail a bunch of items to an alt. After 30 days it will bounce back to you if you didn't retrieve it before then. The trick is remembering what you have sent off to remote storage.

Blogger McGoo used an alt to store all sorts of things he knows he'll need. But last week, he needed to farm Netherweave to finish off his Tailoring goals. So he and a buddy went on an ogre killing spree in Nagrand to get what he needed. He happily skilled up and made the robe he had been after.

Then, a few days later, he found his mailbox stuffed to the gills with Netherweave he had sent to an alt a month earlier and forgot about. Doh!

Have you made any mailbox blunders? How do you keep track of what you send to alts?

Gaslaw asks on the forums whether backpacks will be bigger in Wrath of the Lich King, and (kind of surprisingly) Drysc says it's not beyond the realm of possibility.

I guess it's not that surprising-- it does seem like we are carrying more stuff around lately, in terms of quest and rep items, if not just plain old extra gear sets. We've already had lots of ideas on how to fix things, from creating more keychain setups, to just plain coming up with more bag space. But fortunately, Drysc doesn't seem to have just bigger bags in mind-- he seems to have "better stuff in the works."

What that could be, we have no idea. Pack mules? Dimensional suitcases (made, naturally, of sapient pearwood)? Finally, player housing? Drysc says we'll find out soon.