Create Wireless Connection Homepage

"What you're looking for is generally called a Captive Portal and there are a variety of open source ones available that run on commodity hardware. E.g. the highly hackable Linksys WRT54G. The one I'm most familiar with is NoCat.net, specifically their NoCatAuth software. Sadly, this looks like hasn't been updated in awhile.

A quick Google search for ""captive portal software"" turns up many others though. The Wikipedia page (Captive_portal) might be a good place to start."

"Not sure if this is what you need, but take a look at WorldSpot.net:

WorldSpot.net provides an easy and
competitive solution for anyone to
share his internet connection with
advanced features for authenticating
your hotspot users and controlling how
they can connect to the internet.

WorldSpot.net is the ideal solution
for hotels, campings, marinas, cafes,
bars, campus, residences, WISPs and
many others who live near such places.

For public places owners, you can
easily print WYSIWYG customized access
tickets with codes to gain access to
your hotspot.

You can bill your users online and
fully automate your hotspot. You set
your own prices and get the highest
revenue share of the market: 75% of
your hotspot revenue goes directly to
your paypal account. Please click here
for more information.

No need for a PC, your hotspot can fit
inside a single cheap wifi router. But
you can choose any hardware you want
to scale your hotspot to ANY size
(municipal metro scale wifi is
possible)

You can easily fully customize and
brand your hotspot landing page with
an embedded wysiwyg editor. Here is a live landing page demonstration.

(emphasis mine)"