Just to finish this line of inquiry off in this thread, here is a link to a Wikipedia article dealing with the subject: Spartan Pederasty. Basically, some ancient sources say that the relationship was sexual, and others say that it was not. My guess would be that some were and some were not, depending on the preferences of the older man...
On Topic: A Spartan hoplite in D20/3e should have a special feat enabling him to use the long spear in one hand, in my opinion. Herodotus tells us that the spears of the Greeks were longer than those of the Persians and this gave them an advantage at Thermopylae, which is something I would like to see simulated somehow. I guess there is a good argument for all Spartans being Fighters as compared to other Greeks as Warriors, but maybe it could be Warrior versus Commoner (or some combination of expert and warrior or something). All depends on how you represent a "typical" warrior, I suppose.