Well, thanks for reply, first of all.
But I didn't actually expect any answer, because it was kinda sharing an updates/upgrades I got.
So making it simple, yes, you can control a lot of DC/Servo motors using some small extensions for Raspberry, for example I'm using "Adafruit 16-Channel 12-bit PWM/Servo Driver - I2C interface - PCA9685" as a 16 PWM output module to control 2 DC motors (movement of the robot) and 2 servo motors (moving web-cam of the robot). As a DC motor controller I selected Sabertooth as it was part of LynxMotion 4AWD robotic platform.
But instead of using cheap batteries I've bought Anker Astro 3 with 2 usb output:
1. First USB output I've soldered to add 5V power to Adafruit module
2. Second USB output is used to power up Raspberry + WebCam + WiFi dongle
3. 12V output is used to power UP DC motors.
So it's a kind of Linux based (Raspberry PI) robot controlled over Internet (my router is already setup to be accessible, through VPN, from outside world)! I'm planing to add some Gyro/Distance sensors after it's fully functional base (hope this weekend), if someone is interested, follow me up on my blog:
Thank you very much Raspberry PI - I can walk through my home from all around the world if I have internet connection! Thank you everyone who was patience enough to answer my stupid new bee questions in robotics!