No, but also yes
Mind Blade Finesse states:
Mind Blade Finesse: The benefits of the Weapon Finesse feat apply to the mind blade even when it is in forms that cannot normally be the subject of Weapon Finesse (including two-handed forms).
Compare this to Flurry of Fists:
Flurry of Fists: When making unarmed attacks and making a full attack, the soulknife can make one additional attack at her highest attack bonus, but all attacks in the full attack suffer a -2 penalty to the attack roll. This extra attack does not stack with abilities that grant additional attacks, such as Two-Weapon Fighting, Flurry of Blows, or other such effects. The soulknife must have the Improved Unarmed Strike feat in order to select this blade skill.
Since Mind Blade Finesse does not have that line about requiring weapon finesse in order to take it, you can take it without having the feat.
Note: In order to receive the effects of weapon finesse, you still need to have taken the feat, as all Mind Blade Finesse does is allow you to apply its effects to your weapons.