This page lists about a dozen links to key places on the web regarding Tcl/Tk. It's quick and dirty... sort of RAD, just like Tcl/Tk :o)
There's a weekly post on comp.lang.tcl, called Tcl-URL! (with an archive [L1 ]), which summarize news and points to a couple of central Tcl/Tk sites:
The "Welcome to comp.lang.tcl" message by Andreas Kupries
http://www.westend.com/~kupries/c.l.t.welcome.html
The contents of the page above is mailed to everyone posting
to news:comp.lang.tcl for the first time.
Larry Virden maintains a comp.lang.tcl FAQ launcher
http://www.purl.org/NET/Tcl-FAQ/
Scriptics maintains a highly organized Tcl resource center
http://www.scriptics.com/resource/
They also keep info to convince your boss Tcl is a good thing
http://www.scriptics.com/scripting/
NeoSoft has a comp.lang.tcl contributed sources archive
http://www.neosoft.com/tcl/contributed-software/
Cameron Laird tracks many Tcl/Tk references of interest
http://starbase.neosoft.com/~claird/comp.lang.tcl/
Tcl/Tk Consortium can search comp.lang.tcl and c.l.t.announce
http://www.tclconsortium.org/resources/
Cetus Links maintains a Tcl/Tk page with verified links
http://www.cetus-links.org/oo_tcl_tk.html
Findmail archives comp.lang.tcl.announce posts
http://www.findmail.com/list/tcl_announce/
There are two newsgroups for Tcl
news:comp.lang.tcl.announce
news:comp.lang.tcl