I'm fairly confident that Paladins will be geting more Smites at higher levels if they revisit the core classes even slightly in 3.5E.
Almost everyone agrees that they need it, and it fills the blatant whole at high-level paladins (one spell: Holy Sword, doesn't make 10 levels of paladin interesting.)
From the link in my sig, here's my Paladin House Rules:
The Paladin's and Ranger's spell progression is really whacked. It makes no sense that at 4th level, they get BOTH 0 and 1st level spells all of a sudden, AND that the 0 level spells are not separated from the 1st level spells.
In addition, Paladin's and Ranger's caster level is not considered ½.
Here is the corrected spell progression: (taken from J on the ENBoards forum)
Daily spells per level for Paladins and Rangers
L 0 1 2 3 4
1 - - - - -
2 0 - - - -
3 1 - - - -
4 1 0 - - -
5 2 0 - - -
6 2 1 - - -
7 2 1 0 - -
8 3 2 0 - -
9 3 2 1 - -
10 3 2 1 0 -
11 3 2 2 0 -
12 3 2 2 1 -
13 3 2 2 1 0
14 3 2 2 2 0
15 3 2 2 2 1
16 3 3 2 2 1
17 3 3 3 2 1
18 3 3 3 2 2
19 3 3 3 3 2
20 3 3 3 3 3
A paladin’s 0-level spells include: Create Water, Cure Minor Wounds, Detect Poison, Disrupt Undead, Guidance, Light, Resistance, Virtue.
A ranger’s 0-level spells include: Create Water, Cure Minor Wounds, Detect Poison, Endure Elements, Know Direction, Light, Mending, Resistance.
In addition, a Paladin's spell list should be expanded (for example, there are only FIVE 2nd level Paladin spells!). When compared to a Holy Liberator (from Defenders of the Faith, or DotF)), some spells make sense to be added:
1st level: Remove Fear
2nd level: Aid, Bull's Strength, Cure Moderate Wounds, Eagle's Splendor
3rd level: Cure Serious Wounds, Remove Curse
4th level: Cure Critical Wounds
Paladins NEED more smiting power like Ricky Martin needs another hit: BAD!

How the heck does ONE smite per day strike fear into the hearts of demons? It's like saying you're armed to the teeth to fight evil when you only have one bullet in the clip.
Paladins get an extra smite per day at 6th, 10th, 14th, and 18th levels.
Remember, smite is only good for ONE attack. Not even for a whole round's attacks.
A Paladin's mount is a Magical Beast. They should progress as a Magical Beast.
If your mount is Celestial, than when the paladin goes up in level, the mount advances as a Celestial.