Rather than complain about the lack of new projects, why don't you bust out a soldering iron and create one of your own?
It can be very rewarding to stuff boards designed by somebody else, but it's a whole different level of satisfaction to create something from scratch, even if it barely works at all.
Once you get something, no matter how crude, take it to a meet. You'll be surprised at the response. I like high-end commercial gear, but I would far rather listen to a high school kid's $20.00 Radio Shack project mounted on plywood than the latest $5k amp.
Pick an area and educate yourself in it. Doesn't matter if it's digital, analog, solid-state, tube, etc.. Build a few simple circuits and share them with others. After a while, you'll begin to realize that there are a whole lot of under-explored areas in audio electronics and you'll begin to have ideas of your own. As an amateur, you won't be limited by the constraints of cost, size, parts availability, and sonic fads that dominate commercial designs. Seek out and use non-standard parts, explore unusual and alternative topologies, treat the casework as an art project rather than a minimalist afterthought. Accept that most of your work will be failures, but that if you keep trying, every once in a while you'll come up with something that's not only good, but uniquely different from anything else out there.
I work on solid-state industrial electronics for a living, but my own little corner of the audio world is DHT amplification. With some small exceptions, there hasn't been a new DHT for 75 years, but there are still plenty of opportunities for creation in this area. I'm sure the same can be said about any other area of audio electronics as well.