There are clients for telnet and SSH but I couldn't find any app including SCP. Is there any?
I use a combination of two apps to administer local servers without internet access. There might be a good scp/sftp app I don't know - but AirSharing does file serving so well that I just turn it on then ssh into the server. From there, I sftp/curl the files I need back from the iOS file server.
Found something more useful. Textastic works with SFTP.