This is too dense: "boutique", "network", "developers", "designers".
Instead try something that reads well, like "Get help with your MVP" or "Get help with your weekend project". This has the added benefit of explaining the benefit.
In other words, IMO you should switch your short-and-big and your long-and-small message:
WeekendHacker
"Get help with your MVP"
"WeekendHacker is a site for entrepreneurs, programmers and designers to meet and work together on small projects and maybe turn them into the next big thing."
I like "a boutique network of developers & designers". Sure, other explanatory text is welcome, but in general I hate the american way of writing prose which actually says very little.
Instead try something that reads well, like "Get help with your MVP" or "Get help with your weekend project". This has the added benefit of explaining the benefit.
In other words, IMO you should switch your short-and-big and your long-and-small message: