Thanee's Research: The headband of Charisma and belt of Constitution research ultimately fails, but at the end of your research you realize that you probably simply need more reagents. The items are going to cost 50% more than expected. In other words, the formula for the price of these items will be [bonus]^2 * 1500 instead of [bonus]^2 x 1000 as is typical of ability score boost items. You believe that with additional research of 600 gp for each item you will be able to successfully craft them.
The travel cloak research is successful with the following caveats. The item grants the benefits of the endure elements spell only when attempting to resist the effects of environmental cold, making you immune to environmental cold effects (other than those created by magic) and nonlethal damage from hypothermia or freezing temperatures. The cloak may also convert into a tent. In addition it may be activated as a standard action to instantly dry the character off completely as per the spell prestidigitation. It does not allow you to create food or water however.
Thanee's Contacts: Your first contact is a historian and magical knowledge specialist in the employ of the Greyhawk Library. She is a 6th-level adept named Liera. Liera is willing to cast adept spells of 2nd-level or lower for Justine at half the market price (60 gp for 2nd-level spells, 30 gp for 1st-level spells, and 15 gp for 0-level spells; all are cast at 6th-level). She also possesses an extraordinary knowledge of the arcane and grants a +2 circumstance bonus whenever making a Knowledge (arcana) check with her aid. She has a +13 bonus to Knowledge (arcana), a +12 bonus to Spellcraft, and a +10 bonus to Knowledge (history) and Knowledge (the planes).
Your second contact is an acolyte in Greyhawk's temple to Pelor named Cruadan. He is a 3rd-level expert who has the ear of the temple's high matriarch, Sarana. In addition to his ability to grant you an audience with the high matriarch (as long as the situation is warranted), he can also vouch for you should you require the casting of any cleric spell of 8th-level or lower. A standard donation as well as the cost of material components is still expected and evil creatures may not be the recipient of such spells unless they first atone.
Your final contact is a member of the Greyhawk Thieves' Guild named Rodish the Quick. He is a 4th-level rogue with connections not just to the Thieves' Guild, but a number of other guilds and organizations within Greyhawk. Because of his position as a guild information broker, Rodish is well-versed in the goings on throughout the city. Rodish has a +9 to Gather Information Knowledge (local) and Sense Motive, and a +8 to Diplomacy. He is apprised of all the typical gossip within the cities that pledge fealty to the Domain of Greyhawk as well as the happenings of neighboring regions and nations such as the Bright Desert, the Wild Coast, the Free City of Dyvers and the Duchy of Urnst.
I'll do my best to finish the other reviews this week, but I want to do them when I have time to sit down and look at them carefully since this is the final review. Thanee's took an hour and a half, and that isn't counting the stuff I just posted above.