Is there any way to upload a screenshot from an iPad to this site (or other StackExchange sites)? [duplicate]
Solution 1:
Use Dropbox to upload it, then copy the link to the clipboard and paste it in your answer using the Markdown syntax: 
Solution 2:
Dropbox is a good idea, but since you are using Adobe Ideas, which has an "email photo" link, you could just use the Email Upload features of any photo sharing site (eg. Flickr email upload link, twitpic, etc.), and then copy the link from the browser.
Solution 3:
It appears that you can't do so directly (darn it) so you'd have to do it indirectly. You can either sync it to a computer and then use that computer to ask your question, or upload it to a Web site and then manually use that URL for the image (via either Markdown or HTML).