Wikipedia is a major force on the Internet. Here is a good interview with Wikipedia's founder, Jimmy Wales.
Wikipedia had little money when it started. It ran on three servers until two of them crashed on Christmas day years ago. A fundraiser brought in $20,000 that paid for eight servers.
Since the economic meltdown Wales sees a lot of panic going on. People remember the .com crash in 2000. Don't expect Wikipedia to be sold soon or sell out to advertisers.