Mike,
Living in the DC area (so I know a little about MD issues), I disagree with Shelia as you likely are required to have an HOA by your own governing documents and, perhaps, zoning agreements.
However, the first thing that needs to be done is hire an attorney and track down the builder so the Association is properly transferred to the membership. Otherwise, whomever purchases the properties from the bankruptcy court will be the new declarant and control the Association. Additionally, the attorney can assist you in having the performance bond (if one still exists) go to the Association vs. lenders.
That said, your question was concerning HOAs in general.
I offer the following:
Info in General: Read and understand your own governing documents
Maryland Condominium & Homeowner Association From Community Association Network (has links to applicable news articles, applicable laws, etc.)
Guide to Understanding Homeowner Associations For association boards, residents, and new home buyers by HOA-USA
HOA or Homeowner Association - What is an HOA? by neighborhood link
Best Practices Reports by the Foundation for Community Association Research
For info on Transition (transferring control to the membership): Transition pdf document by the Foundation for Community Association Research
Developer/Homeowner Transition: A Guide To Success by neighborhood link
For info on Reserves: Subject: Reserve Studies/Funds 101 Thread on this forum which has additional links (broken links may have been repaired later in the thread) about Reserves. Understanding Reserves is as important as understanding your governing documents.
If you decide to serve on your Board:
The Board Member Tool Kit A GUIDE FOR COMMUNITY ASSOCIATION VOLUNTEER LEADER from CAI
A GUIDE FOR HOMEOWNER ASSOCIATION BOARD MEMBERS by HOA-USA