The highly anticipated San Andreas remake which uses the GTA IV Rage engine has gone beta! You can download it now and find more information at the official site:

GTA IV San Andreas - gtaivsa.com

Also check out the MODDB page

Time Table of the BETA released on Mod DB

BETA 1 | Codename "World Base" | Release: August 9th, 2011

Includes:
• Basic world conversion
• Main character changed (no sounds)
• Vehicles
• Weapons
• Basic startup SCO script (GTAIV and TLAD)
• World basic parameters for timecycle and weather changes


BETA 2 | Codename "World Motion" | Release: December 16th, 2011

Includes:
• A lot of improvements
• Traffic
• Radio
• HUD
• Sounds
• Road Signs

BETA 3 | Codename "World Enhancement" | Release: August 1th, 2012

Includes:

• Multiplayer
• Races
• Gang wars
• Improved Setup
• Improved Launcher
• Improved overall graphics
• Remade timecyc
• Far distance for trees and lights
• Las Venturas updates
• Interiors
• Props fixes
• Breakable objects
• More vehicles
• More weapons
• More peds
• More sounds
• More collision materials
• More shaders
• Bug fixes
• ...AND MORE!