You're not only welcome to contribute to PowerShell.org, everyone who helps runs it, and everyone who visits, would deeply appreciate it. This is an all-volunteer situation, so we only get as much help, assistance, and education as we're all willing to provide each other. It doesn't need to be a proud, elite few doing all the work - everyone has something valuable to offer.
PowerShell.org isn't a site "owned" by the people who run it. That team has changed over time, and always will. PowerShell.org is meant to be a platform for the community to help itself. PowerShell.org will only ever be as rich, as useful, and as helpful as you help make it. If you're thinking, "wow, PowerShell.org would be a lot more useful if..." then it's up to you to make it happen. Those of us who run the site are here to give you the tools, and a place, but it's up to you to make it a resource.
Click these links (and more will be added over time, so check back) for info and ideas.