Unfortunately, no. only 4 wires run through the cable and are exposed at the other end. You would need a 5th (the USB ID, aka OTG lead).
So I just finished creating my own modded cable and it is working great.
I've attached pictures of the build here. I found that this only works in Android 2.1 (8150 build for me, may work with other 2.1 builds). 1.6 seems like it doesn't have the drivers for this.
DISCLAIMER: If you try to duplicate what I did here, you're taking the risk of damaging your cable beyond repair, and if you do something incorrectly and plug the cable in to your Streak, there is a definite possibility you will damage your streak permanently. So anything you do, do so carefully and at your own risk!
I will say this; this cable is HARD to de-shield! It has metal shield all around the parts we need to get to, and I had to cut with metal clippers and desolder parts of it to get the shielding off. Not pretty, and pretty risky for damaging the cable. I would advise you buy an extra cable before trying this. I didn't have an extra, but I was really risking not being able to charge my device or something if I broke my cable.
After removing the shielding you can see that there is a small PCB with traces marked 1 3 on the left, and then 2 5 on the right. These correspond to the PDMI specification at
http://en.wikipedia.org/wiki/PDMI .
For my build, I chose to solder a switch to bridge the OTG pin 4 to GND pin 2. This way, my cable can still be used as a normal USB cable as well. In one image I have flipped the opened PDMI connector over and you can see an orange wire I have soldered on to pin4. (One side of the PDMI connector has ODD pins, like 1,3,5,7... the other side has EVEN 2,4,6,8...). Pin 2 is the first pin on the right on the EVEN side, and pin 4 is the second.
As was stated in earlier posts, you can use a female to female gender changer for the other end of the USB cable, rather than soldering on your own connector or something.
Note that having the cable in OTG mode when plugging your streak in to your computer or power adapter over USB could damage something because OTG mode will start outputting power over the same pins that it's usually inputting from!!!