The Olympian has been replaced with the Tyr in Starsiege:2845. While there was nothing wrong with the Olly, it wasn't designed for war. As Ditto mentioned, it was pressed into service from its designation as a cargo hauler. Now that the war is over, its role will be filled by a Herc specifically designed to fill that niche -- the Tyr.
The initial concept of the Tyr was developed by community member, Dacon, the winning entry in a vehicle design contest back in August of last year. Further tweaking to the design as well as the final modeling was done by Audacity, with the skinning by Trinity.