As of now, what you see is what you get. Instagram is meant to be clean and clutter-free...you aren't necessarily supposed to be able to download others pictures and manipulate them, but rather see what they post, as it's posted.
Originally Posted by 0pusX
With Facebook's recent purchase of Instagram (for $1 BILLION, mind you) I'm sure we will see subtle changes and small features added...but I wouldn't expect to see anything big change in the interface for a while. Facebook picked it up at a great time just after it's expansion to Android, which will expand the customer base IMMENSELY.
Good luck with your photos!