Tomba! and Tomba! 2 are out now on the PSone Classics section of the European PSN for £6.99 each, per MonkeyPaw Games. The games, ports of the original NTSC versions, had some emulation issues but are now available for download on PS3 and Vita.
Additionally, Tomba! 2 is being discussed with SCEA for release in North America, and would be available on PSN for PS3 and Vita as well. Tomba! was originally scheduled to launch on the European PSN in September.