Originally Posted by CYF

Dynadot is a very good registrar. The wikileaks.org domain is still registered there. Their bulk pricing is competitive. I have quite a few there.

Other alternatives since people are asking:

Name.com is good, I use their free Verisign ID Protect that works with my paypal key fob. I keep some of my semi-important domains there. They are slightly higher priced than the cheap registrars but bring me piece of mind.

Fabulous is another great one to keep your high value domains at. The "retail pricing" isn't very competitive but the pricing tier I'm personally on makes them really cheap for me. Free executive lock on domains.

Internet.bs is very good. Great pricing, simple clean interface, no issues at all.

NameSilo is an up-and-comer. Coupon code BUCKOFF to save $1 on a reg/transfer to try them out. Up front and cheap pricing.

I personally used to really like Moniker in the past, but the support has gone downhill, they've had issues with whoisguard failing and showing info, and lately I've had problems where I couldn't manage my domains because they couldn't communicate with the registry. I'm moving domains out of Moniker. I have maybe 8 left to move out.