Magic

• The Variant: Summoning Individual Monsters rule (DMG p.96) is in effect. This means that when you summon a certain type of creature, you always get the same individual one. Everytime you summon, say, a celestial badger, you get the same celestial badger. If you summon two, you get the same two each time. If you don't like one of the individuals, or if one of them has actually, truly died (creatures that are "killed" when summoned don't actually die), you may change drop one individual monster and roll a new one each time you gain a level in a spell-casting class. The same thing applies to familiars/paladin's warhorses/animal companions. I.e. familiars' et als' stats must be rolled, not copied from the book. (Except Int, which works differently.)
• Psionics is magic is psionics. Psionics is a third form of magic (arcane, divine, psionic). Thus Detect Magic detects psionics and Detect Psionics detects magic. No difference. (This is the default but worth mentioning.)

• Psionic Equivilencies:

  Skills:

  Psicraft is Spellcraft, but with a -2 unless both are class skills (the reverse is also true).
  Remote view is Scry for all intents and purposes.
  Use Psionic Device is use Magic Device in all ways.
  

  Meta-magic/Meta-psionic Feats:

  Multi-class characters (with levels in Psion/Psychic Warrior and in any other spell-casting class) with Enlarge Power are considered to have Enlarge Spell, and vice versa.
  Same with Extend Power and Extend Spell.
  Same with Heighten Power and Heighten Spell.
  Same with Maximize Power and Maximize Spell.
  Same with Quicken Power and Quicken Spell.
  Same with Craft Psionics Arms and Armor and Craft Magic Arms and Armor.
  Same with Craft Universal Item and Craft Wondrous Item.

  Other stuff:

  Pearl of power: Works as crystal capacitor with capacity appropriate to the equivalent level.
  Ioun Stones:

  Vibrant purple - stores 6 levels of psionic powers.

  Pale Lavender - Absorbs powers up to fourth level.

  Rainbow - (new) 5-point crystal capacitor that regenates itself every day.

  Dull gray - As 1-point crystal capacitor but disintegrates after first use.