On Tuesday Twitter made photo uploading available to 100% of its users. If you missed the announcement back in May just look for the camera icon in the bottom left corner of the tweet box. Click it and select the picture you wish to upload. Then the picture will appear as a small icon on the bottom left, and the number of characters you have left for your text will be on the bottom right as always.
When you see a Twitter picture URL in your time line just click the Tweet and it the picture will appear on the right side of the screen. This addition to helps elevate using another service to send pictures on Twitter. If you still have questions about Twitter see my previous post What is Twitter. So tell me, what do you think of this new feature?