All of the R.A.T.s and the M.M.O.7 will be available in multiple colours from now on - Matte Black, Gloss Black, Gloss White and Gloss Red:
For those worrying about gloss finishes leading to a lack of grip, a gloss surface can often be grippier than the soft touch finish used on the matte black versions. For another real world example, if anyone has tried the different colour versions of the Nokia Lumia 920 then they should understand where I'm coming from - the matte black or cyan versions are definitely more 'slippery' than the gloss white, red and yellow versions.
Of course the mitigating factor there is how much you sweat because that will always add a slippery layer between you and whatever you're holding. This is much in the same way that ice in itself isn't slippery, but when pressure is applied to it it causes it to melt, resulting in a slippery layer of water