Several weeks ago, President Bush signed the "Freedom to Display the American Flag Act of 2005". This looks to me like it could alternatively be named the "Another Way to Sue Your HOA Act", but the College of Community Association Lawyers has recently prepared some guidance on compliance.
CAI members can access the guidance through this link:
CCAL Flag Act Guidance
Utah community associations also need to keep Utah Code Ann. Chapter 57-24 in mind; that statute appears to go further than the federal act.