gaucho,

I signed up last year, and got the card i the mail, I believe it says something (somewhere in that confusing site) that you will get the number by mail, I dont think there is any way of speeding that up unless you call mexicana to lookup the number. I dont htink you miss anything by waiting, you can still fly after signup and just post the flights manually later...

the 4625 comes from a 625 mile bonus for online signup.

I think there may be confusion in that Mexicana seems to have both a kilometer and a mile system, perhaps mexico residents use kms and US/EUR/ASIA/AUST use miles??

I checked Hilton site to because usually airlines give 2 hhonorspts/mile, seems odd to me but if correct you can't beat it... I did check the reverse figures in case they were saying how many miles you get to change hhonors to mex freq miles, but those numbers didnt match either. lets hope...