Some VMware users received Fusion 4 beta invitations this week, and screenshots are already online. There’s no official word if the VMware Fusion 4 beta will be available to the general public at a later date, or when the final release will come down. But the site Fusion4Upgrade.com speculates the final release will coincide with Apple’s release of the Mac OS X Lion operating system this summer.

If you didn’t get invited to the VMware Fusion 4 beta, you can prepare for the public release by brushing up on your Windows-on-Mac skills with these VMware Fusion performance tips and advanced tips from expert Mike Nelson.