Shutter release cable Nikon?

Hi, I want to start taking some long exposure photos, and possibly later putting together a few time lapse videos.
I have an entry level SLR - Nikon D3000, and I was wondering if there's a shutter release cable for it, or could I only use the Nikon ML-L3 Remote Control? - My only concern is that someone has said this on Amazon:

"I bought this for making long exposures in the D90's 'bulb' mode. In this mode, the first click of the button will open the shutter and it will stay open until the second button press. However, for some unknown reason, the shutter will only stay open for a maximum of 30 minutes! I had been hoping to make exposures longer than this and did not realize that one can only do this with the WIRED remote. Seems silly that this remote can't do the same as the wired one and I'll now have to make a second purchase".

Does that mean I would need a wired remote for exposures longer than 30 minutes, or is that just in the case of a D90?

Nikon ML-L3 Remote Control is what many of the entry level cameras use. This means that you will have to hold the button down for the lenght of your long exposure.

Other Nikon dSLR's use a remote cord that plugs into the front of the camera.

All 35 mm Nikon cameras and the D100 can use actual cable releases.

The person talking about the D90 is confused. The maximum timed shutter speed on all the Nikon Digital SLR's is 30 seconds. For the shutter to work in the "press once to open and press again to close" mode, it would have to have a Time exposure setting like many of the 35 mm SLR have. NONE of the digital dSLR's I have seen, have such a setting

Amazon review-
"However, for some unknown reason, the shutter will only stay open for a maximum of 30 minutes! "

Actually it's not "unknown" as it says exactly that on Page 72 of the D3000 user manual.

If you want a <=30 minute exposure, use "Time" setting.
If you want longer, use "Bulb" but you'll have to hold the shutter down or devise some way of doing it.
I don't think you have the option of a non-wireless shutter release as the shutter button doesn't have an internal thread like in the old days ;-)