There was a rather badly-managed OLPC project in Birmingham, Alabama. I have a paper co-written with Mark Warschauer and Shelia Cotten on it - once my website is back up it'll be available here: https://morganya.org/research/Ames_OLPC_Birmingham.pdf
They wouldn't sell to individuals generally (“poor Americans” weren't specially excluded), because their entire model (and the basis of their pricing) was direct bulk sales (or construction licenses) to public education entities (principally, national ministries of education), for use within public education curricula.
Initially, they overtly were exclusively dealing with national ministries of education; later they became more flexible and had some discussions with lower-level US entities, including some deployments.