I was wondering if there is information available regarding the stats, feats, skills, etc. of the henchmen in this game, specifically in HoTU. I've looked all over this site and can't find anything.

I don't think any guide goes into details for feats and skills, but here are the basics:

Deekin: Reptilian, True Neutral
Bard (14)
Red Dragon Disciple (1)
STR: 8
DEX: 12
CON: 15
INT: 10
WIS: 10
CHA: 18
Located: The Yawning Portal, Well Room (chap 1)

Sharwyn: Human, True Neutral
Bard (7)
Fighter (6)
STR: 14
DEX: 18
CON: 12
INT: 13
WIS: 10
CHA: 20
Located: Undermountain, Level 1 - Central. (chap 1)

Daelan Red Tiger: Half-Orc, Chaotic Good
Barbarian (13)
STR: 23
DEX: 14
CON: 14
INT: 10
WIS: 10
CHA: 7
Located: Undermountain, Level 1 - Central. (chap 1)

Tomi Undergallows, Halfling, Chaotic Neutral
Rogue (11)
Shadowdancer (3)
STR: 10
DEX: 23
CON: 16
INT: 12
WIS: 10
CHA: 10
Located: Undermountain, Level 2 - South. (chap 1)

Linu La'Neral, Elf, Neutral Good.
Cleric (15)
STR: 16
DEX: 12
CON: 12
INT: 10
WIS: 23
CHA: 12
Located: Undermountain, Level 2 - East. (chap 1)

Nathyrra: Elf, Lawful Evil
Wizard (9)
Rogue (3)
Assassin (6)
STR: 12
DEX: 20
CON: 16
INT: 14
WIS: 10
CHA: 10
Located: Temple of Lloth, Lith My'Athar (chap 2)

Valen Shadowbreath: Tiefling, Chaotic Good
Fighter (13)
Weapon Master (5)
STR: 19
DEX: 15
CON: 19
INT: 15
WIS: 12
CHA: 10
Located: Temple of Lloth, Lith My'Athar (chap 2)

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Source: http://www.sorcerers.net/Games/dl.php?s=NWN&f=NWN/neverwinter_nights_hotu_b.zip