Pages added to passport turn around time

I need to get some pages added to my passport before two separate trips - one to Asia, one to North America.

DX is supposed to come tomorrow, I leave on the 23rd. The website says the turn around time is two weeks but I'm nervous it's not going to be enough time.

Has anyone done this by mail? Getting to London for an 8:30am appointment is nearly impossible right now.

Thanks!

Woo hoo! Took exactly a week from pickup to drop off.

You can have pages added?!  I didn't know this - and I can make an appt at the embassy here in London?  I am rapidly running out of room and already got a comment last week about needing more from the Swedish exit officer.  Rather than get a new one it would be nice to extend the life of this one, although with all the expired EU family permits and stamps in there, maybe I could save some time at borders with a new one!

Yep, I got 48 pages added. It costs $82, which is also cheaper than a new passport + fees to transfer visas.

newcomer link: http://london.usembassy.gov/cons_new/acs/passports/extra.html [nonactive]