Also called 'everflux' .If your site is new, or hasn't shown up in google for long, it may because our "fresh crawl" (which runs each day) was finding your site instead of our main crawl (which runs about once a month). Our "fresh crawl" is a newer feature, and we're still experimenting with which pages to crawl, how deeply to crawl, etc. We even reserve the right to (gasp!) not do a fresh crawl on some days because we're doing tests or reviewing new code. Someone wrote in recently and said "my site got in google three weeks ago, and you've dropped me four times!"

Nope, it's just that we don't always crawl the same pages in our fresh crawl, and we don't always crawl to the same depth. As we do a full crawl of the web, we find most of the sites from our fresh crawl and put them in our regular index. My advice on our fresh crawl is to view it as a nice "bonus" on top of google's deep index. Users can always search our full index, but sometimes we can serve up even fresher pages as an extra nicety.
What does this mean for the average webmaster? In the word of the great Hitchhiker's Guide, "Don't Panic." Just do the normal things you should do:
1. Create a great site.
2. Submit your site to google on our "add url" form.
3. Get a link from the Open Directory Project or other directories (Yahoo, etc.).
4. Don't panic if your site takes a little while to show up in google. Be patient, and start to look around the web--there's lots of great advice about improving your site for users and search engines.
thks GG