Kunoichi: that is correct, regarding the magic items. As for a Handy Haversack, I'm afraid not - extraplanar storage space etc. is crazy rare in IK, so you'll need to work out a way for excess baggage to be carried when you guys are adventuring.
TheGlyphstone: I don't actually mind which way you go for your cohort. It's totally up to you. As for whether they can take Tome feats, I'm going to say yes. I may regret this later, but then again, with enemies also having access to them (for [Combat] and [Skill] feats, only enemies with class levels, otherwise it gets weird where some things are CR 4 but have 9 HD and thus have +9 BAB and 12 max ranks), it should work out fine.
Anyway, here is the list of those who have been accepted (not that hard - one messaged me to indicate she was dropping out):
The Glyphstone (Warjack and Friend)
Ixy (Swashbuckling Troublemaker)
Frost Rose (Illusionist-Adventuress)
Some Guy (Warcaster)