Yes, so long as you're attacking with a melee weapon you may apply intelligent blademaster.
Intelligent Blademaster states:
Benefit: You can use your Intelligence modifier instead of your Strength modifier when making a basic attack with a melee weapon.
And so the crucial determinator is the "Weapon Category" of the weapon:
Weapons in all categories are further defined as either melee or ranged and as either one-handed or two-handed.
Melee: A melee weapon is used to attack a target within the weapon’s reach. Unless otherwise noted, a melee weapon has a reach of 1 square. Melee weapons are used with melee powers and with close powers that have the weapon keyword. A melee weapon cannot be used with a ranged power or an area power that has the weapon keyword, unless the weapon has the light thrown or the heavy thrown property or the weapon is thrown as an improvised ranged weapon.
Thus, because the melee category explicitly allows thrown weapons, Intelligent Blademaster allows thrown weapons.