I usually try to set this baby up in cron before long meetings.
When my phone goes off I can just mumble something about the servers being down
(everyone knows that I get phone pages whenever a server goes down) and dash for the door.
Of course if the meeting is constructive, I can ignore the page, but it's nice to have the option.

#!/usr/local/bin/perl 

open( SENDMAIL, "|/usr/lib/sendmail -oi -t" )
  or die "sendmail didn't open: $!\n";
print SENDMAIL <<"EOF";
From: sdavis\@mydomain.com
To: <myphonenumber>\@voicestream.net
Subject: alarm clock
Try to look sufficiently panicked!!

EOF
close(SENDMAIL) or warn "sendmail didn't close";
[download]

~monk d4vis
#!/usr/bin/fnord