Grand Theft Auto - Liberty City Stories

DRUMMAD - http://www.drummad.com
Offers hidden package maps, hints, and cheats. [Requires free membership]

GamingMoz - http://www.gamingmoz.org/games/g474/playstation-portable/grand-theft-auto-liberty-city-stories/
Release data, box art, and a message board.

GTA Liberty City Stories - http://www.gtalibertycitystories.net/news/index.php
Contains news, information, previews, and screenshots.

GTAPSP.com - http://www.gtapsp.com/
News, overview, characters, missions, and FAQs.

TotalVideoGames.com - http://www.totalvideogames.com/games/GTA:_Liberty_City_Stories_Index_4383.htm
Game information, previews, and screenshots.