How I love those little girls 14, 13 even younger, how they satisfy my hunger... Chingka, Cha-Chingka, Cha-Chink Er wait, I guess that song wouldn't be appropriate on this forum... ;-)
eSim games does offer a demonstration version (A full version with an expiration date) if you are a prospective military customer who is interested in using Pro PE to train with in your unit. If you are just a gamer who wants to check it out, then your pretty much out of luck as far as a demo is concerned. SB2 will probably have a demo. (At least I would imagine.)
SB2 is not due soon. Steel Beasts: Professional Personal Edtion (SBPPE) is the latest release from eSim games (That's what "this" is.). It provides the new graphical engine which will be used in SB2, but it is designed for military training on an individual basis. Steel Beasts 2 will be the next true sequel to SB. It will be oriented towards gamers and sim fans in general.