Verisign began adding wildcard DNS records to all .com and .net domains yesterday, which redirect lost surfers to Sitefinder, a Verisign company.
Basically, this means if you typo a domain address, are directed to a nonexistent domain, or just put in a bogus .com or .net address, you'll be redirected to Sitefinder.
(Try sdljfajfdlancdklnakld.com, for instance, as a bogus address to see what I mean.)
For instance, certain software (ftp, traceroute, ping, mailserver software, etc.) usually return a "hostname unknown" when they fail to resolve an address. Now they will encounter a "wildcard," likely returning a "false positive" of sorts.
Colour me a little concerned.
Story in The Register can be found here:
Slashdot's story is here:
Kuro5hin's story is here: