hahaha... I am using Sharebuilder, too (Capital One)...
I've got to say, generally speaking, I like them...the only thing I don't like is the extra fee for trades under a penny...
I also have an account at Options Express, but don't have any money there yet... It takes too long to transfer what I have at Share Builder to move it over to Options, so anything new I buy, I will use Options Express. My current positions are all at Share Builder.
With respect to NSAV, I believe since it is just a split, and not a name change or cuspid change, it should be no problem to use Share Builder for it to trade immediately...
I hope we all do well with this!
How big of a position do you have (if you don't mind me asking)