My thoughts ....
I think the Dread Necromancer's Undead Mastery (level 8) ability which grants +4 str, +4 dex, and +2 hit points per level is supposed to replace the need for the Desecrate spell or the Corpse Crafter feat.
Tomb Tainted is a neat idea as a feat, but a little too "rules gamey" for me and no longer necessary once you become a Lich. If I'm going to heal myself with necromantic magic, i want it to be at the expense of someone else (Vampiric Touch, etc.).
Feats that look neat:
Undead Leadership (Libris Mortis)--Even more undead, for those hordes that we love.
Spell Focus Necromancy, Greater Spell Focus Necromancy
Black Lore of Moil (Complete Arcane) -- Extra damage when you need it, very useful for AOE spells.
Profane Lifeleech (Libris Mortis) -- Divine feat so you can use your rebuke undead attempts to hurt nearby enemies and heal yourself. Supernatural so if you can't cast spells for some reason, you can still blast in an area of effect.
Life Drain (Libris Mortis) -- Inflict extra damage equal to your chr bonus when draining a level and gain extra temporary hit points. Good feat for level 12+. Likewise, the Improved Energy Drain and Spell Drain from Libris Mortis are neat feats. Spell Drain in particular, since if you drain a level from a wizard, you will steal one of his most powerful spells.
Mother Cyst -- If you think the Necrotic Cyst spells are interesting, you get access to all of them by taking this feat.
So, my feat progression might be
Human Dread Necromancer
Level 1: Profane Lifeleech, Spell Focus Necromancy
Level 3: Greater Spell Focus Necromancy
Level 6: Undead Leadership
Level 9: Black Lore of Moil or Mother Cyst
Level 12: Life Drain
Level 15: Improved Energy Drain
Level 18: Spell Drain