There are plenty of tasters around here.
Best is to check often if the name is available for registration. Don't visit the site as this may inflate traffic figures.
Do you have particular name servers in sight ?
Snap and NameJet aren't really the tasters - they're the aftermarket auction sites.
Go to Domaintools and find the numbers of domains added and deleted per cred. The taster creds will stand out, since they delete almost as many as they add per month.