Only one is known so far for MPs. It's already in the database but not in the game.
The stats may, nevertheless, be temporary and not accurate.
It's a new long-duration pet damage buff, an extension of the "Installi with..." line.
It's the first time that a new nano is added to this line since before SL!
The new nano is:
Improved Instill With Malign Intent
http://aomainframe.info/showitem.aspx?AOID=270800
Duration: 2 hours
All Damage Modifier +201
MaterialCreation >= 2147
BiologicalMetamorphosis >= 2147
The best "Install" so far was!
Instill With Malign Intent
http://aomainframe.info/showitem.aspx?AOID=116814
Duration: 32 minutes
All Damage Modifier +61
MaterialCreation >= 874
BiologicalMetamorphosis >= 874
As you see it's an improvement of +140 damage over the previous nano.
This represents roughly +11% to the minimum damage of The Rihwen with the best current buffs.
Although the nano is not level locked, the high requirements to cast it mean that it will be likely used only by 220 MPs using the Rihwen.
It would be possible to cast it before 220 but at the cost of gimping yourself on some other useful statistics, mainly lifepoints or evades.
The 2147 MC required is the highest MC requirement of any MP nano. (2045 MC required to cast The Rihwen.)
The 2147 BM is by far the highest BM requirement for Mps: Mortificant the Eternal requires 1466 BM, and the Evocation lines introdcued with LE (buyable with Victory points) required 1901 BM.
If these values were confirmed, and if no new ways to increase nano skills were introduced, we would hit the maximum of what MPs can achieve without starting to drop some life/evades/damage items for nanoskills items, and, in fact, MPs will already need some nanoskills items equipped (armor,NCU, Hud/Utils)
Note also the long duration of the nano.... does this mean we could hope for a longer duration of MP combat pets any day soon?!