Azure Talent: You do not have to be Psionic to take this feat. In fact, doing so makes you Psionic.
The PP granted by each point of essentia increases by 1 for each point of essentia invested - so instead of getting 2PP for 1E, 4PP for 2, etc, you get 2PP for 1, 5PP for 2, 9PP for 3, etc.
So long as at least 1 point of essentia is invested in it, this feat also allows you to use a single 1st-level power (chosen when taking the feat) with manifester level equal to twice the invested essentia, less 1. You use Cha as your key stat.
If you gain the ability to manifest powers from another source (i.e. Soul Manifester), you use your manifesting level from that source if it's higher.
This replaces Wild Talent and Hidden Talent.
Incarnum Spellshaping: Once per day you may invest essentia into this feat and choose a number of incarnum spells to prepare. You may prepare one spell level for the first point of essentia, two for the second, three for the third, and so on (these stack) and cast each of these once that day. Your caster level is equal to the twice the amount of essentia invested, less 1 (1=1, 2=3, 3=5, etc), and Cha is your key stat.
If you gain the ability to cast spells from another source (i.e. Soulcaster) they may be treated as spells from that source (same caster level if higher, etc).
Open Chakra: You can always bind a soulmeld to the opened chakra, regardless of any chakra binds you may or may not have from a meldshaping class.
Psycarnum Infusion: I'm going to stomp on abusing this with certain incarnum feats. If you use it with Azure Talent, the PP is not temporary so you can't choose to spend it first - thus, you lose PP again as soon as you stop using Psynarnum Infusion. You can use it with Incarnum Spellshaping or Midnight Metamagic, but once the spells are chosen they can't be changed and once they're cast, that's it, reinvesting the essentia doesn't give you more.
Shape Soulmeld: If you can already shape soulmelds, the soulmeld you get from this feat remains separate, and is always shape-able regardless of your other meldshaping limits. However, the maximum number of soulmelds is limited by your Con.
Scribe Scroll/Imprint Stone/Craft Staff: Do not exist.
Brew Potion/Craft Wondrous Item/Craft Magical Arms and Armour/Forge Ring: See "Crafting", below.