With further investigation and in relation to the first post within this topic, regarding the mystery Rendition accelerator that was under development (a new fact every week about the upcoming card, see here:
http://web.archive.org/web/19990221150025/www.rendition.com/FOW/), I have found out a little more about this card.

According to
http://www.bjorn3d.com, the card was to be called the
Rendition Verite v4400.
Here is a quote from
http://www.bjorn3d.com/sitehistory.php:
Quote:1998 also was the year for the FOWs. I think every serious Rendition owner knows what I am talking about. To create hype for the upcoming release of the new V4400 chipset Rendition created the Fact Of the Week. Every week a new fact about the V4400 was released. I actually have the FOW files on my computer somewhere but heres a summary:
Week 1: Dual Pipelines
Week 2: Two Heads Are Better Than One
Week 3: 2x64 > 128
Week 4: Bargain Matinee
Week 5: The More The Merrier
Week 6: Go Deep
Week 7: Getting Bigger, Getting Better
You can read it all at
http://web.archive.org/web/19990508121220/www.rendition.com/FOW/In the end Rendition was bought up by Micron and the V4400 delayed/scrapped.
Seeing as Björns site was largely based around the Rendition community, I would take his statement of the v4400 to be 'delayed/scrapped' to be true.

Amongst many other spots of evidence that concur with this, I can only assume the v4400 never made it.