...whom I've met in person: 30 (and two more this afternoon)
...whom I've met in person more than once: 29 maximum, depending on definitions
...whose home I've been to: 19 (including dorm rooms)
...who have been to my house: 24
...whose precise location I know offhand: as erin said, define precise? I know, off the top of my head, what city all but one live in. I know what city all but one PROBABLY last slept in.
...whose full names I know offhand: 21 (and at least 4 more are known but not coming readily to mind)
...whom I've known more than 3 years: 10 or so
...who live outside my country: 1
...whose journal I consider myself "addicted" to: 5
...whom I've lived with: 2 (plus 1 other I've lived next door to)
...who's an ex: 0
...who I'd do: 11 (and maybe 3 others)
...who I've done: uh. define 'done'. let's be strict and say 2.
...who I have a secret crush on: 0