Not Presto, but the new, Blink one, that is based on Chromium. Shitty or not, this is new Opera, and this is their first release for Linux. It's been only a year…
Anywho, I wrote a SlackBuild for it. It also makes use of alienBOB's Chromium PepperFlash package, so now you can have the latest Adobe Flash in two browsers (which are basically the same thing though).
Be warned that:
- this is very unstable development build;
- the browser itself is not polished yet and is under active development;
- only 64bit arch is supported;
- this SlackBuild has only been tested on Slackware64 14.1.