Plo Koon and R7-F5 appear in set 8093, Plo Koon's Jedi Starfighter. This will be the second appearance for Plo Koon (set 7676) and the first for R7-F5.
Minifigure Parts and Accessories
It would appear the Plo Koon is an exact reissue of the minifigure that appeared with the Republic Attack Gunship.
R7-F5 on the other hand, although not a new rendition of astromech droid, a droid in this color scheme has not previously been released.
As shown here, Plo comes with a standard blue lightsaber.
Army Building Potential
Little here to want in multiples, I'm going to peg the ABP for these figures at low.
The biggest draw is that you can finally find Plo in a set less than $100 USD. With a $25 price point, this new rendition of the Jedi Starfighter can net you a new droid and rare Jedi all in one fell swoop.
(Picture from Brickset Flickr stream)