i consider the chest burster scene the best part of alien 3. the movie - to be honest - wasnt very good at all - (it was truely Hell on Wheels making that film) but the last scene does bring a tear to my eye -with the dramatic music - the slow motion of ripley falling to her death - then the queen bursting out only to be chocked by our hero. it was certainly a nice ending to the original alien trilogy (alien ressurection is part of Alien The Next Generation series to me, along with the a v p movies!!!) the newer version of alien 3 is an improvement - but no way perfect. its a pity the cut out bits didnt have sound to them (its actually surprising that the missing pieces werent finished, as Aliens Special Edition was out on VHS at the same time as the theatrical realise of Alien 3 - and they should have realised that one day "we'll realise Alien 3 Special Edition as well!!!).
I beleive they never liked the chest burster sequence, hence it being cut out from the new version. but thats a shame - as i love it. and what could have been a perfect (well - as perfect as you can get) version of the movie - its ruined as it doesnt have my favourite bit in it!!!
Mixster - you mentioned about the bull/ox host. well - it was never changed to come out of the ox - it was originally changed to come out of the dog. the ox was the original idea. but the writters later thought that if the alien came out of an ox - and if the creature was to take traits of the host - then an ox/alien hybrid would be slower, clumsey, etc - what ever an ox can be!! but a dog/alien would be harder, faster, stronger. so half way through production of the special effects of this, they changed it to a dog. hence the birth sequence of the ox/alien looking a bit crap - as it was never completed fully.
my favourite bit of the missing scene was when they find the dead queen facehugger.