The two best online resources for searching/researching architecture programs are the following --
www.naab.org - Maintained by the National Architectural Accrediting Board (NAAB), their website links to the list of accredited programs. You can search by both geographic region and type of degree program (BArch, MArch). Once you choose a program, it provides the full contact information along with the URL of that particular school.
www.archschools.org - Launched in February 2008, this new website is maintained by the Association of Collegiate Schools of Architecture (ACSA). Parallel in content to Guide to Architecture Schools, the website provides the ability to search programs on a number of criteria. The program listings also provide narrative and enrollment statistics to learn more detail about each program. Some programs also have images posted.
Of course, the very best resource online is the actual program's website, but the two cited websites above will help you search the architecture programs.