Is there anything we can do on iOS to stay safe while waiting for Apple to issue an update for the latest FREAK SSL vulnerability? I guess the vulnerability has been around for a decade [ars technica], but should we just stay away from using any personal information until there is a security patch?
Use Chrome for the moment. IIRC, Mac Firefox (and Chrome) uses a vulnerable crypto library, but Google has promised a fix for Mac Chrome is imminent. 
See this site for a table of vulnerable and safe browsers.