[Wolsh]

Так Вам инерции чтоли не хватает? ОК, тормозим!

mc.onMouseMove = function  () {
    this.cell_x = Stage.width-this._width-_xmouse + this._width/(Stage.width/_xmouse);
    this.cell_y = Stage.height-this._height-_ymouse + this._height/(Stage.height/_ymouse);
}    
mc.onEnterFrame = function () {
    this._x = this._x + (this.cell_x - this._x)/10
    this._y = this._y + (this.cell_y - this._y)/10
}