Hurricane Ike has maximum sustained winds near 100 miles per hour right now but the real story is it's size. It's a big storm with hurricane force winds extending up to 115 miles from the center. Tropical storm force winds extend up to 255 miles from the center.
The minimum pressure (945 millibars) is borderline low enough to support a category 4 storm but I imagine the size of the whole storm is keeping the gradient from being tight enough to cause the winds.
Another interesting storm for this year.