1. About 300
2. Oh, go on then ...
In case anyone thinks I'm claiming this technique as my own invention, I got the idea from the last issue of Digital Camera Magazine. Always worth a look.
I'm still playing around with different sized vessels and trying to get a classic "crown" effect, but it's quite difficult. Might try a new medium, eg milk, oil or syrup.
And yes, the D300 is lovely.
Thanks for the comments guys.