Here is the Bob Parsons article http://www.bobparsons.com/may2006.html
May i suggest using namecheap or snap names if your looking for names that are dropping yet have i lost a name at namecheap even after searching there for its availability then going back next day and registering.
this guy is just using a bot to scan registers and all he is doing is byuying all names he can thats available there talk on this at NP heres thread i think its domibot this time though hxxp://www.namepros.com/legal-issues-and-disputes/185087-domibot-spying-on-whois-searches.html?highlight=domainbot
Also post on Big Bobs blog about your experience on it.