John's criteria for being a Rockstar Genealogist are:
"Rockstar genealogists are those who give 'must attend' presentations at family history conferences or as webinars, who when you see a new family history article or publication by that person, makes it a must buy. If you hang on their every word on a blog, podcast or newsgroup, or follow avidly on Facebook or Twitter they are likely Rockstar candidates."
The blog post has a list of those who have been nominated from past years and he solicits nominations for other potential rockstars.
The deadline for nominations is noon (EDT?) Friday, 2 September, and voting for Rockstar Genealogist in various categories will start on Saturday, 3 September.
Please participate - check your favorites to make sure they are nominated, or nominate someone who meets the criteria, and then vote when the opportunity is available.