News to know: Windows 7 RC; Cloud wars; Scareware; Facebook WWDC;

Here are today’s notable headlines. You can get News To Know via email alert and RSS daily.  For continuous updates see BNET’s around-the-Web tech coverage.

Dion Hinchcliffe: Cloud computing and the return of the platform wars

• Microsoft fights the 'open' fight amid the clouds. Techmeme

Mary Jo Foley: Microsoft accidentally confirms Windows 7 RC coming in May

• Ed Bott: Updating the Windows 7 release schedule
• Adrian Kingsley-Hughes: TechNet accidentally leaks Windows 7 Release Candidate information
• Microsoft ad: 'I'm just not cool enough to be a Mac person'
• Users already honing their IE 9 wish lists

• Dancho Danchev: Scareware meets ransomware: "Buy our fake product and we'll decrypt the files"
• Ryan Naraine: Exploit code sends Mozilla scrambling to fix Firefox
• OpenSSL patches three security holes

Sam Diaz: NVIDIA countersues Intel over licensing agreement

Apple WWDC dates released; Will Steve Jobs be there?

• Jason O'Grady: WWDC 2009 dates announced
• GigaOm: Skype for iPhone to Be Released as Early as Next Week  
• Apple to launch 'variable-pricing' for iTunes
• iTunes 8.1 creating duplicate entries in iTunes, iCal, Safari and Address Book
• How-to: upgrading the SSD in your Dell Mini 9
• Boot time shootout: MacBook Air v. Dell Mini 9

• Harry Fuller: EPA, CO2 and reality
• Joe McKendrick: SOA Consortium confab emits green glow
• James Farrar: Microsoft & Bill Clinton: We'll Save the Cities from Climate Change

Images: What Windows 7 might have looked like

Kingsley-Hughes: Does the end of free XP support help push you to Vista or 7 ... or Linux?

•  Joe McKendrick: Who cares if XP support is ending?

CNET News: App Store refunds: Much ado about nothing

• PC World: Controversy Erupts Over Possible MS Mobile App Fee 

Microsoft hit with patent suit over update tech

Dan Kusnetzky: Liquid Computing and the dynamic datacenter

Larry Dignan: Google cuts 200 sales and marketing jobs

Best Buy: Quarter better than expected; Home office sales surge

Ars Technica: Clear skies ahead for WiMax, LTE in 2009 and 2010

How Windows 7 UAC shapes enterprise security

Dana Blankenhorn: An open source grab for 3D web power

• Blumenthal needs to define the word open
• Blumenthal will not give industry free hand in standards
• Microsoft deeds are the problem

Gadget Gal's daily deals: MacBook Air, Asus Eee PC netbook, Canon All-in-One photo printer

Gallery: iGoogle gets its game on

Matthew Miller: Opera Mobile 9.7 coming with Opera Turbo server acceleration

Brian Sommer: Satyam, IBM - Layoffs, Acquisitions, Rumors

Christopher Dawson: Is it too late to turn around math/science ed in the US?

• Students sue over "sexting" case

Zack Whittaker: BBC News run by students for a day

Red Hat: Customers less scared now