More information
There is a wealth of information available for the BC346XT scanner.  Websites exist for the radio itself, regional and local scanner groups and software support.

RadioReference.com   (http://www.radioreference.com).
One of the most exhaustive sources is the RadioReference website. This site has an extensive listing of scanner frequencies for the entire USA, Canada and many other nations. For the USA the scanner database is broken down by state and county, then local systems.

RadioReference also has an extensive Wiki section that explains how almost anything scanner related works. There is a large Forums section where you can discuss the BC346XT or any other topic. Ask questions, make comments and discuss the topics of interest. Active in the forums are experts in all facets of scanning, including some of the movers and shakers in the industry.

You can view the RadioReference Wiki article on the BC346XT at http://wiki.radioreference.com/index.php/BC346XT

Scanner Master   (http://www.scannermaster.com)
If you need a scanner, software, accessories or information, this is it. ScannerMaster sells Uniden, GRE and RadioShack scanners, accessories such as antennas, cases and power cords as well as a range of programming software from Butel. The BC346XT can be viewed at:
ScannerMaster.com

BC346XT Yahoo Group:  (http://groups.yahoo.com/group/BC346XT)
Yahoo Groups has hundreds of scanning related email based discussion forums. These typically have Files Sections where users can upload and share programming files, documentation and other files, Photos Sections to share pictures and other features.
There are also hundreds of Yahoo Groups for local and national scanner groups and other topics. Due to the vast similarities between the BC346XT and BCD396XT most of the features discussed on the 396XT apply equally to the 346XT as well. The User Group for the 396XT is much more active and can be of great use to users of the 346XT:
BCD396XT Yahoo Group:  (http://groups.yahoo.com/group/BCD396XT)

Uniden's Corporate Website: (www.uniden.com)
Direct from the manufacturer, you can download information about the scanner here, view accessories and order parts. You can go direct to the BC346XT page at:
http://www.uniden.com/products/productdetail.cfm?product=BC346XTor Unidens BC346XT Wiki at http://info.uniden.com/twiki/bin/view/UnidenMan4/BC346XT.