For better or worse, after being in this industry for a long time now all I can say about a new database launch is: cool, I'd love to talk to you in 3-5 years when you've had time to work out the hinks and people have figured out what your strengths and weaknesses are and where the real gotchas will getcha.
Until then: good luck. A distributed, linearly scalable, easy-to-admin NoSQL database with transaction support and full ACID would be delicious indeed.
- Known limitations (http://foundationdb.com/documentation/beta1/known-limitation...)
- Anti-features (http://foundationdb.com/white-papers/anti-features/)
- Performance considerations (http://foundationdb.com/documentation/beta1/developer-guide....)
Talk to you in a few years :)
I hope you do well -- the world really needs a good amalgamation of strong data integrity (ACID, transactions) and the ease-of-life that distributed databases generally give you. Since I don't work in an industry where I need microsecond reads, I'm perfectly happy to pay the cost of "it might take 10s of milliseconds to commit this" if I can avoid having to go down the "okay, now I have to shard my project" path for an eighth time. :-)