one more question....it looks like if i do buy a RTW i'd buy the Oneworld leaving from London--i'd be saving well over $1,000, which seems well worth the trouble.

since i technically have to buy it in the UK, what i'm wondering is:

-can i buy it over the from the states, calling directly to the UK office?
-if so, would i be able to get it ticketed the day of my departure once i'm actually in london....or is there limited a window in-between when the ticket is purchased and when it's to be ticketed?

thanks!