Right, well I have only seen up to episode 10. But I will be watching 11 tonight so I will be up to date. I will not check back here until then so everyone who has seen 11 can post without worrying about spoilers!
Wow! So much is going on - Ethan - who was (apparently)not on the manifest/passenger list of those on the plane... and him not going to get Jack when Charlie asked him to

... did he really attack the pregnant girl? Why?
One thing I wondered is why Sayid did not ask the French Lady (Danielle) who arrived on the island by boat where they were - I am sure she will have a far better idea of their location than they do already! Although she *was* a bit crazy!!!
What's going on with the whispers? The whisperers must have some physical form but perhaps they are not as we are - I have been thinking as to who they could be but everything seems so cheesy - small hobbitey people, big giants, etc - it's all been done before in old films with poor special effects. So it's probably none of that. Could it be something as simple as natives on the island? But it seems odd they would never meet thee crazy french lady

(maybe she wasn't totally crazy when she arrived but it doesn't seem to have taken her long to kill her husband... does she really have a child (Alex)? It can't be Ethan because he's too old, and speaks accent-less English. Has he spent the last 16 years in isolation hiding from Danielle?
She also said "if we are lucky it will be a bear" so I wonder what else there is on the island... (she reassured us that there were no monsters though). But Lord knows what is worse than a bear face to face with no gun!
Talking of bears, it's weird that bears are on that island... unless they are albino panda bears
My favourite characters (despite the obvious biggies) are Hurley and Sayid. I can't be sure but I think Sayed might be played by the same chap who was in the English Patient... I'll double check that!
If many of my comments have been answered already by Ep 11 then don't worry - I won't be checking back here until I have seen episode 11 anyway so I'll be able to dismiss it then. However I'd be surprised if it was ALL cleared up by episode 11.