Hi, I just have created a Facebook group for composers & music producers. It is a small group where we can talk about music, software, hardware, industry, ask for feedback or even share our works.
Besides that It is also a community for users of my virtual instruments (Pssst! Instruments) but the idea is to gather active professional music creators to discuss and share experience.
If you have vst instruments for sale (or free) you can also talk about it on Vi Control. There are a lot of vst buyers there (seriously, people on that forum buy everything)
Cheers.