Quick update: the Opera developers have started providing 32bit Linux binaries with the latest Opera developer 30.
Opera stopped updating its Linux browser for about a year, until June 2014 when Opera 24 was released on the Developer stream, followed by the stable Opera 26 release. But all those builds were for 64bit - until today, when the developers have started providing a 32bit Linux version of Opera developer 30.
While officially there are only deb packages available for download, you can use Opera on any Linux distro by following THESE instructions (see the featured comment).
Tip: for how to get Flash and H.264 to work in Opera, see THIS article.