Steve has some worries about genealogy and the internet. Genealogy seems to be growing by leaps and bounds due to the popularity and ease of use of the internet. Somewhere, sometime, someone else is probably researching your same ancestors and this is the best way to trade information. However, while the growth in genealogy on the Internet has been a tremendous boon to genealogists, I would inject a word of caution. I'm no expert, but I wouldn't trust anyone's family tree which quoted a webpage or Gedcom download as a source.
Any record is prone to error, even primary sources like birth and death certificates.
Just because it's on paper doesn't give it more credibility. I can't count how many people I've met who claimed that their parents had actually given them a different name, but ended up with something else because some lady at a hospital typed the name wrong on the birth certificate. The Internet is just a publishing medium. It makes no difference if a primary source is recorded in electronic form or paper form. What matters is when the event was recorded, who recorded it, and under what circumstances.