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Nice indeed!

That is hands down one of the coolest interfaces I've seen in a long time.

Sweet interface!

Indeed, also I can't believe they integrated all those services.

Similarly try namecheck.com

It searches the main social sites for handles but also searches for domains and trademarks.

Perhaps it's just me but I'm always a bit hesitant to use third party domain checkers. I can't speak for namechk.com but who says the owner of such service isn't logging all entries?

Whenever I want to verify whether a domain is available I use the official whois servers.