Feats for Undead commanders

[green slime]

What feats/items/spells exist in WotC material or RR I/II that enhance a Cleric's ability to enhance/bolster/command/rebuke undead? Apart from Extra Turning and Improved Turning?

Stuck in a place faraway from my volumes, yet participating in a pbem/chat game I'm in desperate need of assistance.

 

[shilsen]

Spells:
Desecrate
Command Undead
Control Undead
Eagle's Splendor (for the Cha boost)

Item:
Circlet of Persuasion