Side Channel Attacks Database
There have been 645 publications, 55 issued US patents, and at least 19 PhD theses related to side channel attacks.
Number of side-channel attack related publications by year: 
2008 66
2007 107
2006 126
2005 96
2004 82
2003 58
2002 43
2001 27
2000 15
1999 13

About one third of the publications appear in the proceedings of CHES, the remaining two thirds are spread throughout different journals and conferences.   Below is a summary of the number of publications from the top conferences:

CHES (Workshop on Cryptographic Hardware and Embedded Systems) 138
FDTC (Fault Diagnosis and Tolerance in Cryptography) 58
IACR (International Association for Cryptological Research ePrint Archive) 52
DATE (Design Automation and Test in Europe) 15
CARDIS (Smart Card Research and Advanced Application IFIP Conference) 13
IOLTS (International On-Line Testing Symposium) 12
CT-RSA (RSA Conference, Cryptographers' Track) 12
PKC (International Workshop on Practice and Theory in Public Key Cryptography) 11
ACISP (Australasian Conference on Information Security and Privacy) 10
DAC (Design Automation Conference) 9
FSE (Fast Software Encryption) 9
ICISC (International Conference on Information Security and Cryptology) 9
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