I asked Christian to send me a message after he arrives (he lands around 15:30). Long is also arriving on Sunday, around 13:30 I believe. I guess the lobby of Mandelay Bay is probably our best option. Note however that I'm not staying in Mandelay Bay until after Monday since MS didn't cover enough nights and Mandelay was too expensive for me. I'm not far away though, just a bit further up the strip.
I checked today and it seems my phone network (Softbank) has a fairly reasonable daily flat rate for packet usage abroad, so I might enable data roaming, which means I'm a bit more reachable even when not in range of wi-fi. Facebook is a good way to contact me in that case since I get push notifications for that.