You may not have to wait long for an aftermarket SERT. I can't find the original article but apparently Harley and the original SERT manufacturer have parted ways. Somehow HD did not keep, or ever have, the rights so the SERT OEM is coming out with a version that will have all the bells and whistles that they, and the users, wanted but the moco refused to release. A USB connection being one of the benefits.
OK, found it. Here is a post from "Steve Cole":
The SERT was and always has been a product of TTS. Just look under "help" and "about" in every copy of the software ever sold. We manufactured both the hardware and software. HD has never owned it. Up until last year there were agreements in place that no longer apply so we are taking the product to the public and it will be marketed as a TTS product once again. If you do some searching you would find we've been manufacture tuning and logging software since the late 80's early 90's. The product will revert back to the original names of Mastertune and DataMaster. Ever wonder why the file ext's were .MTx and DMx? Now you know why. The current product (SERT) can be run with both applications on the screen at once and you can simply "click" from one window to the other as this is a standard feature in windows. We have no involvement in the new tuner that HD will be selling. The maps on our site are a free service that we provide for anyone to download and use. It's a clearing house of maps for our products but it's up to you the public how good it becomes. As stated before I cannot get into everything that will be coming in our first public release but rest assured there are many improvements with many more to follow in future releases. Everything we've wanted to do for over 2 years is in the works but it will not all come out in the first release as it would take to long to complete it all. Any purchaser of our new TTS product will be able to update to the latest software free of charge. This is something we've wanted since we first started selling through HD back in 2002 but again they refused to move forward with much of anything other than to add the next model year for coverage to the product.
Their website hasn't been updated yet, but here it is: