Open Labs is not a software company - they make hardware only. There is no basis for "an arranger module" without arranger software... however you can have an "eKo arranger" today by taking an existing Windows arranger program like Jammer Live or One Man Band and program an existing eKo module to act as an arranger ie: start, verse, chorus, ending. The more important questin is: what VST(s) or softsynth will you assign the arranger to play?

Open Labs also has it's hand full developing their product to work with the vast and growing number of VSTs on the market without going after the arranger market just yet, which is a subset of the larger synth market.

Members of the development team of Open Labs participate in the Harmony Central Keys/Synths/Samplers forum. I've already suggested functions and possibilities that would apply to the arranger user, such as internal speaker modules.

Meanwhile, I am working on my own "mini-eKo", which is basically a laptop with an Echo Indigo low-latency audio card and an Oxygen 8 controller. I've ordered Steinberg's V-Stack program which allows you to play VST's without a sequencer program and is the same program that ships with the eKo. I intend test some of the arranger possibilites, such as running the Yamaha S-XYG50 softsynth from One Man Band. This should be an approximation of how the eKo would work as an arranger.