I'm having the exact same problem as:

https://bitcointalk.org/index.php?topic=83209.msg1745711#msg1745711

and support hasn't answered my email.  I'm guessing bitinstant ran off with my $100?

EDIT: BitInstant now says I should have it within 8 hours.  24 hours later... not very "instant".  I'll report back if I still dont have my money.