I never thought the beta phase could be so fast but, right now, Cisco has just announced Cisco VPN Client v5.0.7 for general availability!

Key Capabilities of the Cisco VPN Client 5.0.7 :
New Platform support – Windows 7 & Windows Vista 64-bit platform compatibility

Software is available for download by any customer with a Cisco.com SMARTnet™ enabled login.

Software Access: http://tools.cisco.com/support/downloads/go/Redirect.x?mdfid=281940730
Release Notes: http://www.cisco.com/en/US/partner/docs/security/vpn_client/cisco_vpn_client/vpn_client5007/release/notes/vpnclient5007.html

Here an advise from Cisco about this product:
We do recommend migrating to AnyConnect / AnyConnect Essentials over staying with the Cisco VPN Client, because SBL (Start-Before-Logon) and Embedded FW features are not available for these new platforms.