While the statement made by the previous post is true that the Service Manuals and ETM information is held in the BMW serive computers previously known as the MoDIC /DIS Systems, the standalone ETK and TIS CDs for Windows are still available from the Central Letter Shop (
www.centrallettershop.com/cd.html) who are the Federally mandated supplier of service information. Also these can be found all the time on Ebay and other web based classifieds for car parts and manuals. Roadfly (
http://www.roadfly.org/bmw/classifieds/general/) is another such place that I have seen these for sale as well.
I have read the claim that BMW was planning to stop making the stand-alone Windows CD's so that they can control the service information in the future, but the Federal Government recently told them that they will have to continue to suply service information to the independent service community and to consumers to comply with their import regulations. Now they may choose to create new more limited information resources that are just the limit of what is required by the US DOT, or maybe not?
Since your car is well documented in the ETK and TIS CDs that are widely available, don't be concerned about the recent rumors. Just buy a set now and have a good time owning and working on your E38.