As an update, just got an email from Hilton, but their 99 rate is no longer there, this is the current rate in the email if any folks are interested:
"Discover Prague, Czech Republic
Stay in the most romantic city in the heart of Europe - Prague, Czech Republic. Be sure to take advantage of these fabulous rates at the beautiful Hilton Prague.
February 2003 - from only €128 per night.
March and April 2003 (until April 13) - take advantage of our Hilton e-Savings rate: from €137 per night.
Make your reservations today.
Rates are only bookable via hilton.com and exclude 5% VAT. Reservations must be made a minimum of 3 days in advance and can be cancelled until 4 PM day of arrival with no penalties. Subject to availability. Approximate US Dollar equivalents provided as a guideline only. International exchange rates may fluctuate."
Rate Plan "DQ"
http://hiltonemail.com/a/hA$WWQFAH$i...J-iU5hR/hltn16