Is there a clearinghouse, or where can I find a consistantly updated
list of RPF's (request for proposals), preferably in the public safety
arena? We are a new GIS software LLC focusing on demand management and
looking for potential customers. Thanks.

kennyg-ga 

The clearing house for Federal RFPs is the new Federal Business
Opportunities site. It replaces all of the old online federal RFP
sites, the venerable Commerce Business Daily, for all procurements
over $25,000.

"FedBizOpps.gov is the single government point-of-entry (GPE) for
Federal government procurement opportunities over $25,000. Government
buyers are able to publicize their business opportunities by posting
information directly to FedBizOpps via the Internet. Through one
portal - FedBizOpps (FBO) - commercial vendors seeking Federal markets
for their products and services can search, monitor and retrieve
opportunities solicited by the entire Federal contracting community."

http://www.fedbizopps.gov/

On the state level, the best starting point is the National
Association of State Procurement Officials. I'm giving you the link
that goes straight to a list of all the states, their websites, and
their official contacts.

http://www.naspo.org/directory/index.cfm

Some states go further, creating searchable databases of RFP down to
the municipal level, like the State of Washington:

http://search.mrsc.org/nxt/gateway.dll?f=templates&fn=srchrfps.htm$vid=MRSC:10.1048/enu

A fascinating collection of Federal Databases useful when responding
to government RFPs.

http://www.mco.edu/research/feddata.html

Since Public Safety is of interest to various private grant-making
entities, I suggest you also check out the searchable database at The
Foundation Center: Finding Funders:

http://fdncenter.org/funders/web_search/web_search.html

The International Association of Police Chiefs has a great page of
links which

"The links below have been identified as potential sources for
criminal justice related grant funds (technology and non-technology
topics). While not all of the sources have current funding
opportunities, they should be checked periodically for new
opportunities. "

http://www.iacptechnology.org/Library/FundingResources.htm

Since public safety and criminal justice are often closely linked, I
took a final look for searchable RFP databases in CJ and struck gold
with the CJIS group. While it's a pay service, they do have a free
trial:

"The CJIS GROUP sales and research database contains information about
pre-released and released RFP Opportunities, Federal Grant Awards,
State and local government Links, industry and government Reports,
Directories of key contacts, Association Events, and Corporate
Profiles. This One-Stop Shop of critical information can supplement
your marketing and research efforts while saving valuable time in the
process. CJIS GROUP does the time consuming research while our clients
stay focused on the end result."

http://www.cjisgroup.com/databases/index.cfm

I hope this collection of resources lands you the work you're looking
for.

Google Search Strategy

state purchasing organization
state rfp database
RFP database "public safety"

Very quick and thorough response. Pretty close to the target question,
which should have been better refined by myself. Information is very
valuable. Thanks.