Nugget has a pretty vibrant community of SaaS-focused founders. As a modern community, most of that activity is via Slack and Discourse threads, not passive blog posts. The Nugget Slack channels are pretty active, and they include real-world mentoring by folks who have been there/done that.
Like any community, only a small handful of Nugget members are super active. Many people come to Nugget looking for self-implementing ideas, and they tend to wash out when they realize that hard work is involved to make ideas into businesses.
Several Nugget members have done the work to hit revenue, and there is a core group of us who are taking advantage of mentoring by Nugget's Justin and Brandon, who really know their stuff.
I belong to FounderCafe, Fizzle and Nugget; they all add value, but Nugget is laser-focused on actively helping people actually BUILD SOMETHING. If that's what you are seeking, you owe to yourself to check out Nugget.
This already exists, but I can't remember the name. In the last month or two there was a Show HN for matching small business and potential customers. The idea was that customers pledge what they're willing to pay (e.g. I will pay $X per month for Y service), and anyone looking to build a small business could find pre-validated markets to work on, lowering entry risk.