There are a lot of papers from 2006-2008, I think they are rather old.
I was looking for some relatively new papers: Look at them. Most ones describe some tools:
Integrated Analysis of Transcriptomic and Proteomic Data, 2013
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3637682/
Integration of genomic, transcriptomic and proteomic data identifies two biologically distinct subtypes of invasive lobular breast cancer, 2015
http://www.nature.com/articles/srep18517
Transcriptomic and Proteomic Data Integration and Two-Dimensional Molecular Maps with Regulatory and Functional Linkages: Application to Cell Proliferation and Invasion Networks in Glioblastoma
http://pubs.acs.org/doi/abs/10.1021/acs.jproteome.5b00765?journalCode=jprobs
Multiple-platform data integration method with application to combined analysis of microarray and proteomic data, 2012
http://bmcbioinformatics.biomedcentral.com/articles/10.1186/1471-2105-13-320
Chipster: user-friendly analysis software for microarray and other high-throughput data, 2011
http://bmcgenomics.biomedcentral.com/articles/10.1186/1471-2164-12-507
GenomeSpace Tools and Data Sources
http://www.genomespace.org/support/tools
Some questions: What result do you seek to obtain? Which biological question do you want to answer? How is your experimental setup?