It's just part of blizzard's thing of having all the neat new stuff on the realms (in particular, ladder). Keep in mind this came out months before WoW was released and since not everyone is a fan of paying every month to play a game you already bought, there is a reason to play/a market for D2 still until they decide to invent a single player or free online version of WoW (unlikely).

I believe there's a thread on the bnet forums where people are trying and then plugging in the runeword combos they tried onto a spreadsheet for all to see. I could find it probably again if I looked as I think its a sticky there. The fact of the matter is that to really find the runewords someone's just going to have to mass dupe high level runes somehow or wait for Blizzard to release the runewords because I seriously doubt all 11 runewords are of just low level runes and not too many are willing to just potentially throw away higher level runes.