I just happened on this thread today and (like normal) must comment. Great Work. I really like what you have done with them. The Far Realms seems the perfect place IMO.
Now, to the nit-picking:
1.) The following slivers gain a 1 1/2 Str bonus to their claw attacks:
Metallic, Muscle, Crypt, Armor, Barbed, Horned, Mindwhip, Mnemonic, Acidic, Crystalline, Spined, Victual, Root, Shifting, Ward, Brood, Essence, Magma, Synapse, and Toxin.
Creatures only get 1 1/2 Str bonus when they only have a single natural attack. This does not include when they move first and thus are limited to a standard action and thus one attack. As this applies to so many of your conversions; maybe you should add it as a Sliver (Ex) ability. This would not change any other slivers except the Blade, Queen, and the Overlord. Otherwise, the claw damage should be reduced for each of the mentioned slivers in both the Attack and Full Attack entries.
2.) The Blade sliver gets 2 times its Str bonus on its claw attack and 1 time Str bonus on its bite attack. This should be changed as above to either 1 times Str bonus on claw attacks (or add a special ability that lets all slivers gain 1 1/2 Str bonus on claw attacks) and 1/2 times Str bonus on bite attacks.
3.) The Queen is missing her +4 racial bonus on Grapple checks. The Queens claw attack should be +35 (+24 Base, +15 Str, -4 size); the bite and tail stings should also be adjusted to +30. If you add the special ability to deal 1 1/2 Str bonus to claw attacks then the Queen's claw damage would be +22.
4.) The Overlord's attacks are wrong. They should be:
Claw Attacks: +24 (Base) +17 (Str) -4 (size) = +37
Claw Damage: +17 (Str)
Bite Attacks: +24 (Base) +17 (Str) -4 (size) -5 (secondary)= +32
Bite Damage: +8 (1/2 Str)
Tail Slap Attacks: As bite attacks = +32
Tail Slap Damage: As bite damage = +8 (1/2 Str)
If you add the special ability to gain 1 1/2 Str on claw attacks the Overlord's Claw Damage would be +25
Again, I say great work. Cthulhu watch out.
Ciao
Dave