The main thing is that those old domains did not create problems for you: "second hand" domains might have had negative reputation with Google (they might have been part of the network, involved in illegitimate or spammy techniques, etc). Thus you may find hard time getting the site indexed or by linking from it now blacklist your other site.
- Phillip Barnhart
A team including former Google employees has launched a beta service that aims to allow businesses to monitor and protect against reputation damage caused by online malware compromises.
- Phillip Barnhart
But even if the perfect domain name is already taken, newbie business owners still have a number of options. For instance, they can wait for annual registrations to expire, or register domain names with less popular extensions, such as ".info" and ".biz," or use country-code extensions, such as ".us" for the United States or ".de" for Germany (keep in mind, requirements such as residency may apply.)
- Phillip Barnhart
Ex-Google duo launch anti-malware web service > Managed Services > Risk Management > News > SC Magazine Australia/NZ (http://ping.fm/49gnu)
"A team including former Google employees has launched a beta service that aims to allow businesses to monitor and protect against reputation damage caused by online malware compromises."
- Phillip Barnhart
"But even if the perfect domain name is already taken, newbie business owners still have a number of options. For instance, they can wait for annual registrations to expire, or register domain names with less popular extensions, such as ".info" and ".biz," or use country-code extensions, such as ".us" for the United States or ".de" for Germany (keep in mind, requirements such as residency may apply.) Some entrepreneurs opt for easy-to-remember phrases. Others buy names in the aftermarket,"
- Phillip Barnhart