Geneabloggers is shaking up its blogging meme routine and having several options for each day of the week. I've been participating in transcribing records on Monday thanks to Transylvanian Dutch's invention of the Amanuensis meme. Now, there are literally dozens of people transcribing records on Monday.
The records themselves are interesting to read, but it is the breadth of the types of records that really grab you. If you are just starting out in genealogy (or even not), look at the types of records you can use: obituaries, letters, court documents, military records, deeds, wills, probate files, oral histories, diaries, and the list goes on and on.
Mr. MacEntee should catalog the number of different types of documents and use it for his presentations. It's a wonderful teaching opportunity and certainly can inspire someone to search in several new places.