Not exactly news I know but the Gemini CTP (technically CTP2) is out. You have to sign up to SQL Server Connect to get it (Windows Live ID required) and join the Gemini program by clicking the link at the top of the page and filling in a short questionnaire. There's also a Gemini blog here.
Why should you be interested? Well there is a good demo - in two parts - presented by Donald Farmer on here giving an indication:
20 000 000 rows in a spreadsheet being manipulated as if it was 20 000. The hardware running it? You'll have to watch to the end of the second part...
Anyway as I say I've joined the CTP program so when I get the chance I'll be downloading it and giving it a whirl.