Gearbox and a handful of modders are currently testing a beta version of the Brothers in Arms SDK. These modders are making the current version of the SDK better for release of Beta 2. The latest word is that Beta 2 may go live in the next few weeks. If Beta 2 goes well, Gearbox may release the BiA SDK.

Only a limited number of modders will get a chance to participate in Beta 2. If you've got modding experience and would like to participate, let me know.

By the way, it helps if you are familiar with Unreal Ed.