Sorry for the delay, I _thought_ I had instant email notification turned on, but I never got an email - and last week has been hectic so I only got around checking now.
Anyway, the URL is sorta secret, and I didn't want to force people logging in on the server (not just yet at least), so the easiest is to enter an email and you will get an email (which you then can forward) when you are starting to move. You will ONLY get emails once you start moving, so if you have the server email your S.O. then they can check the link for your position.
If you HAVEN'T ever gotten an email (for whatever reason), PM me here or on the forum and I'll send you your link. Note: You need to leave the app running for 3 minutes before it sends the first location.
Anyway, once you DO have the link, you will have to refresh it manually, so far it doesn't do that automatically (yeah, maybe I should change that, there are just so many other things I'm working on).
With 'connectivity' I mean network connectivity, i.e. that the device can send/receive data over the cell network (3g/edge) or wifi.
So to answer the question: Is tracking real-time, the answer is, it depends if you have connectivity or not.
However, since the GPS position works even without connectivity, as soon as you DO get connectivity again (even a very brief one), SkyCharts will try to send off ALL missing position reports it has not done before.
So to re-iterate: GPS position (and the moving map) should work even w/o connectivity (assuming all charts are cached). Realtime tracking really depends on where you fly (and what altitudes). If you're cruising at really high altitudes, you may find out it will dump all the position data once you start descending, and in that case the tracked page will suddenly get all the missing data right before you land. So again, it really just depends on where you fly. Sorry, nothing I can do about that, I have to use the cell network to send data (unlike APRS & SPOT which use radio & satellite to send realtime reports).
You can easily check if you have the charts cached you want to view. After caching, ENABLE airplane mode, and start viewing the charts, should be no problems. But remember to enable the 'cache IFR plates' in the settings if you want ALL TPP's for that sectional to be cached. Otherwise TPP's are only cached once you view them. Just remember to disable airplane mode again if you want to get a GPS fix!
3G/3GS: I never found the built in compass to work that well in cars/planes, so no point getting a 3GS because of that. The 3GS has twice the memory and its a fair amount faster though, so for that reason it may be worth it. The camera is also a little better. Personally I would maybe wait until the next version though (usually in june). And yes, I realize that's quite a while from now!
Finally, SkyCharts (so far at least) treats all devices the same.