Assuming your digital camera has a removable memory card, you can buy a memory card reader that connects to your computer via a USB connection. This is the faster (and saves your digital camera's batteries) than connecting your digital camera directly to your computer (USB). Your digital camera should have come with a manual and software explaing how to do this.
As far as posting pictures, I suggest you read these threads:
http://www.tfproject.org/tfp/showthr...threadid=22397
http://www.tfproject.org/tfp/showthr...threadid=42038
http://www.tfproject.org/tfp/showthr...=&threadid=178