If you don't already know, you can use the Print Screen button (or Alt+Print Screen for a single window) in Microsoft Windows to grab a screen shot and put it on your clipboard. Is there a website that can look at my clipboard, upload the image, and provide me a URL to the image that I can share with others?
This is exactly what the original poster wanted and also what I wanted. I wanted to share this awesome tool for anyone else: http://snag.gy. You just ctrl+v after you print screen and it's there. There are also some editing tools (crop, drawing) if necessary.
You press Ctrl+Shift+4 (configurable to what you want), then you click+drag to select an area with a crosshairs. It then uploads it directly to their service, and puts a short link to it on your clipboard (http://grab.by/shortID). It works quite well, is free, and can be used on OS X or Windows. http://grab.by/4QPg
You click the Jing icon, click to select a window or use the crosshairs to select an entire region, then can take either a still screenshot or a screen video recording. It can then be automatically uploaded to Jing's servers, or you can set it to upload to your own FTP server.
See also this StackOverflow question. It appears there are at least a couple Java tools that will allow the pasting of an image form the clipboard.
Would be nice to know if there are an AJAX-y ones, too.
Yes. Very handy! Imaer can upload a file, clipboard data, or screen selection to Imgur. It does require a right-click > Upload Clipboard, it won't automatically do it, but still so handy.
Edit: Also, depending on what version of Windows you are on, the Snipping program can come in handing for getting the right screenshot. You can save or copy to the clipboard in Snipping, and then use Imaer to get a Imgur url.
There is going to have to be some kind of desktop connect for this to happen.
Try iClippy , it is the closest you will get.
How does iClippy work?
iClippy works by capturing the visuals from screen, camera, or scanner to an online clipboard without having to save the pictures to the local computer first. The images are immediately available for pasting into email, online document, blog, instant message, twitter, facebook, or any other number of resources. The images are also searchable both from the web and from the local sidebar. The images are automatically scaled down to the size that’s appropriate for online resources and as defined by the account type.
Can I access the images in my clipboard from the desktop?
Yes, iClippy comes with a native sidebar application which allows you instant access to your iClippy library. The sidebar allows listing through pages of images, narrowing down the set through search, pinning the image to not be replaced, copying the image into the local clipboard for further use with local or online resource, deleting an image, following the link which is attached to the image, and more..
Provide me a URL to the image that I can share with others? To find a link to an image, proceed to http://my.iclippy.com, find the image you’d like to share, and send its URL.
The limitation here at least for me to vet it, is that it is for Windows only.
I noticed that if you attach an image right here, it creates a URL (http://i.stack.imgur.com/xxxxxx.png) that you can send to others and persists over time. If the image you save is your screenshot saved to a file (in MSPaint even) you can easily share your image with others.