The MinorPlanet.info Gateway provides pages and links for those interested in asteroid photometry and astrometry, including the CALL web site and downloads of The Minor Planet Bulletin.
The CALL web site is located at http://www.minorplanet.info/call.html
Issues of the Minor Planet Bulletin are available at http://www.minorplanet.info/minorplanetbulletin.html
The Ephemeris Generator http://www.minorplanet.info/PHP/call_OppLCDBQuery.php lets you build customized lists of photometry targets based on magnitude, declination, CALL posting status, and more
The asteroid Lightcurve Database (LCDB) http://www.minorplanet.info/lightcurvedatabase.html provides rotation periods and other data for more than 4500 asteroids