would any of you photo guys be able to blow up a 1920x1080 pixel photo a considerable amount (i want to use it for a poster) but still be able to retain clarity?

You can make it any size you want.  Its all about viewing distance.

You can make it any size you want. Its all about viewing distance.

yeah i know what you're saying but i'm asking if there is a way to enlarge it to poster size while still retaining photo-like clarity when viewed from inside a room. make sense?

You're cutting it close for a 5x7 print.  Might be able to stretch the data for an 8x10.  You want at least 90ppi (pixels per inch) for a poster, and 140 ppi for quality print.

You can always call a good lab, and see what they can do.

BTW, if you're looking to make a print of a desktop image from the web......mad copyright infringement.  Totally illegal.

that's pretty much what i'm trying to do, a still shot from a movie. could you tell me more about the copyright infringement, i figured something like that would come up.

so basically there is no chance at getting it in the 2'x3' range with it looking any good?

http://www.copyright.gov/title17/

No.