Giving a single URL of the Instagram photo will show the set of photos by the user. You need to set profile if you want to be searched on it. RSS feed will be generated so you may subscribe your favorite Instagrammer.
Instastream was inspired [J] by Listagram, made by Yusukebe (Yusuke Wada) [J]. The site shows “a public timeline of Instagram” by using Instagram photo URLs appearing on the Twitter’s public timeline. Precisely speaking, you will see only photos shared over Twitter, but still it is a lot.
via Tatsuwo no ChangeLog [J]