Source:
http://www.wowwiki.com/Infinite_dragonflight (link was also posted by Maladramatic). The quotes are the ones with a ■ and everything else that doesnt have one is my own text.
"■The World of Warcraft history site states that during the titans' creation "...there were many Dragonflights." This makes it a possibility, however faint, that the Infinite Dragonflight was always there."
"■Assuming he is the leader of the Infinite Dragonflight it may be possible that Nozdormu, knowing when he is slated to die, may be attempting to alter history in various ways to prevent his death. What these three events in particular may have to do with preventing it is an unknown at this time. An unfortunate but possible result of this meddling could be a commonality in time travel stories where someone trying to prevent an event from happening eventually causes it in the end after all. Another possible theory about the "Master" is that the Infinite Dragonflight served another master that was somehow destroyed and Nozdormu took his place. It is possible that they were once evil but then turned good if Nozdormu really is their master."
(the 'three' events are the Infinite Dragonflights involvement in 3 dungeons within CoT)
"■The fact that the alterations in the time line that the Infinite Dragonflight tried to bring about would have ultimately benefitted the Burning Legion suggests that the infinite dragons may be acting on the Legion's behalf."
"■Many people believe that the dragonflight is a force of good. If they had stopped Medivh from opening the Dark Portal, the Legion would have not invaded the Azeroth using demonized orcs. This would have allowed the humans, dwarves, and high elves alliance to band together and destroy the shattered remains of the Legion in the Eastern Kingdoms.-- This theory is suggested by Chrono-Lord Deja's comment during the opening of the Dark Portal: "Why do you aid the Magus? Just think of how many lives could be saved if the portal is never opened, if the resulting wars could be erased..." This suggests the Infinite Dragonflight wants people to survive."
(There are numerous rerences that the Infinite Dragonflight is a good dragonflight. Others say they are what the Bronze Dragonflight will turn into with time. Others say that the ones serving Nozdormu in 'current time' are evil and the ones in the past are 'good' though that part didnt make too much sense to me but in terms of the Infinite possibly being the future of the Bronze Dragonflight... "■When you encounter Aeonus in Black Morass, he says "Your time is up, slave of the past!" when he despawns a Time Keeper. This makes stronger the speculation that Bronze Dragonflight is actualy past version of Infinite Dragonflight.")
"■-- The fact that Infinite Dragonflight wants mortals to survive is also suggested during the culling with Chrono-Lord Epoch's comment to Arthas, "the deaths you are destined to cause will this day be your own", suggesting the Infinite Dragonflight does not like death of innocent people, assuming his comments are truthful."
And one last final one......
"■Knowing about his eventual death, these events may be tests, set up by Nozdormu to train and mold heroes to one day take his place in maintaining the timelines, the wish that the tests be passed also explains why a benevolent Dragon would set in motion potentially destructive events."