Jeff and Colin have already provided us with some great rules for determining height and weight (in the Player's Manual and one of the downloadable resources, respectively).  I think both give you a good range of reasonable results.  However, it does bug me a little that you have to make two or three rolls (and possibly apply percentages to the results) in both systems.  I initially thought I'd take a crack at some sort of cross-indexed table that generated both height and weight in a single roll.  But then I thought: you're already rolling a bunch of physical stats, so why make any more rolls for height or weight at all?

To use this system, first find the starting height and weight based on the race and gender of the character:

Amazon Female: 69”, 150 lbs.
Amazon Male: 66”, 130 lbs.
Atlantean, Common, Keltic, or Kimmeri-Keltic Female: 66”, 130 lbs.
Atlantean, Common, Keltic, or Kimmeri-Keltic Male: 69”, 150 lbs.
Esquimaux Female: 60", 130 lbs.
Esquimaux Male: 63”, 150 lbs.
Hyperborean Female: 78”, 160 lbs.
Hyperborean Male: 84", 190 lbs.
Ixian Female: 69”, 140 lbs.
Ixian Male: 72", 160 lbs.
Kimmerian or Viking Female: 69”, 150 lbs.
Kimmerian or Viking Male: 72", 170 lbs.
Pictish or Half-Blood Pictish Female: 60", 120 lbs.
Pictish or Half-Blood Pictish Male: 63”, 140 lbs.

Then adjust the starting height and weight using the formulae below:

HEIGHT FORMULA: Starting height + STR damage adjustment + CON hit point adjustment – DEX defense adjustment, +1 for every 5 full starting hit points
 
Height adjustment for STR doubled for fighters and fighter subclasses, height adjustment for DEX doubled for non-fighter classes and subclasses.
 
WEIGHT FORMULA: Starting weight + (STR damage adjustment x5) + (CON hit point adjustment x5) – (DEX defense adjustment x5) + (starting hit points x2)
 
All weight increases doubled for fighters and fighter subclasses.

Just to be clear, having a high enough DEX to earn a defense adjustment is intended to make a character both shorter and lighter.  I also realize that every character of the same race and gender with the same stats and hit points will be exactly the same height and weight, but that seems fair enough to me.

Here are a few examples:

Female Amazon Illusionist, STR 12, DEX 14, CON 13, hp 5
Height: 69 + 0 + 1 - 0 + 1 = 72" or 6'
Weight: 150 + 0 + 5 - 0 + 10 = 165 lbs.

Male Atlantean Priest, STR 12, DEX 15, CON 15, hp 5
Height: 69 + 0 +1 - 2 + 1 = 69" or 5' 9"
Weight: 150 + 0 + 5 - 5 + 10 = 160 lbs.

Female Esquimaux Assassin, STR 15, DEX 17, CON 15, hp 7
Height: 60 + 1 + 1 - 2 + 1 = 61" or 5' 1"
Weight: 130 + 5 + 5 - 5 + 14 = 149 lbs.

Male Hyperborean Fighter, STR 17, DEX 15, CON 13, hp 10
Height: 84 + 4 + 1 - 1 + 2 = 90" or 7' 6"
Weight: 190 + 20 + 10 - 5 + 40 = 255 lbs.

Female Ixian Necromancer, STR 12, DEX 13, CON 13, hp 3
Height: 69 + 0 + 1 - 0 + 0 = 70" or 5' 10"
Weight: 140 + 0 + 5 - 0 + 6 = 151 lbs.

Male Kimmerian Barbarian, STR 18, DEX 16, CON 16, hp 7
Height: 72 + 6 + 1 - 1 + 1 = 79" or 6' 7"
Weight: 170 + 30 + 10 - 5 + 28 = 233 lbs.

Female Pictish Ranger, STR 13, DEX 12, CON 11, hp 9
Height: 60 + 2 + 0 - 0 + 1 = 63" or 5' 3"
Weight: 120 + 10 + 0 - 0 + 36 = 166 lbs.

This system is lightning fast with practice.  It obviously ties height and weight closely to race, gender, and class (particular fighters vs. everyone else).  For someone who wants a much wider range of random results for any given PC, I would heartily recommend either Jeff's or Colin's system.