In addition to class abilities gain the following at each level. 
Characters must qualify for feats (eg dex 13 for dodge). Characters
who do not qualify for a feat will gain it automatically if they
later meet the necessary pre-requisites. Hit die increases mean 
use the next bigger die. D4->D6, D6->D8 etc. Max is D12. This 
increase is NOT applied retrospectively.

Optionally include the Create Spawn abilty anywhere - depends
if it is desireable to have a pile of slave vamps running around.

Level 1

Type changes to undead
No constitution (use str score if necessary for rage etc)
+1 natural armour class
+1 str
Bluff, Hide, Listen, Move Silently, Search, Sense Motive
and Spot +1 per level (max +8)
DR 1/silver & magic (+1 per level, max 10)
Free Feat: Alertness
Fast Healing 1/round

Blood Drain
A vampire can suck blood from a living victim with its fangs
by making a successful grapple check. If it pins the foe, it 
drains blood, dealing 1d4 points of Constitution drain each 
round the pin is maintained. On each such successful attack, 
the vampire gains 5 temporary hit points.

Level 2
+1 dex, +1 cha
+1 turn resistance
Hit Die increase.

Level 3
Gain slam attack (1d6+drain 1 level)
+1 str
+1 natural armour class
Free feat: lightning reflexes
Fast Healing 2/round

Spider Climb
A vampire can climb sheer surfaces as though with a spider 
climb spell. 

Level 4
+1 int, +1 wis
Turn resistance increases to +2
Resist cold 5, Resist Electricity 5
Vampire's natural weapons are now treated as magic.
Hit Die increase.

Level 5
+1 str, +1 dex, +1 cha
+1 natural armour class
Free Feat: Dodge

Alternate Form 
A vampire can assume the shape of a bat, dire bat, wolf, or 
dire wolf as a standard action. While in its alternate form, 
the vampire loses its natural slam attack and dominate ability, 
but it gains the natural weapons and extraordinary special 
attacks of its new form. It can remain in that form until it 
assumes another or until the next sunrise. (If the base 
creature is not terrestrial, this power might allow other forms.) 

Level 6
Turn resistance increases to +3
Fast Healing 3/round
Hit Die increase.

Gaseous Form
As a standard action, a vampire can assume gaseous form at 
will as the spell (caster level 5th), but it can remain 
gaseous indefinitely and has a fly speed of 20 feet with 
perfect maneuverability. 

Level 7
+1 str, +1 dex, +1 cha
+1 natural armour class
Free Feat: Combat reflexes
Turn resistance increases to +3

Dominate
A vampire can crush an opponent’s will just by looking onto 
his or her eyes. This is similar to a gaze attack, except that 
the vampire must use a standard action, and those merely 
looking at it are not affected. Anyone the vampire targets 
must succeed on a Will save or fall instantly under the 
vampire’s influence as though by a dominate person spell 
(caster level 12th). The ability has a range of 30 feet. 

Level 8
+1 int, +1 wis
Resist cold 10, Resist Electricity 10
Slam attack improves to drain 2 levels
Fast Healing 4/round
Hit Die increase.

Level 9
+1 str 
+1 natural armour class
Free Feat: Improved initive

Children of the Night 
Vampires command the lesser creatures of the world and once
 per day can call forth 1d6+1 rat swarms, 1d4+1 bat swarms, 
or a pack of 3d6 wolves as a standard action. (If the base 
creature is not terrestrial, this power might summon other 
creatures of similar power.) These creatures arrive in 2d6 
rounds and serve the vampire for up to 1 hour. 

Level 10
+1 str, +1 dex, +1 cha
+1 natural armour class
Fast Healing 5/round
Hit Die increase (everyone should be d12 now)
Turn resistance increases to +4