Hey, somebody believed it...

The religion of one age is the literary entertainment of the next.

Ralph Waldo Emerson

Luckily we've got a whole bunch of literary entertainment at our disposal.

Here in the US, the most widely-known mths are pretty much all Greek and - to a lesser extent - Roman. The gods of the two pantheons are often confused, somewhat rightfully as the two pantheons are quite similar.

• MythMan.com offers nice reference help with the Greek gods
• MythWeb.com offers more of the same, nicely presented
• Winged Sandals doesn't have as much info but is a lot more fun to play around on
• Mythography does a nice job presenting the Roman pantheon

Honestly, though, I enjoy the Norse myths a whole lot more than I do the Greek or Roman.

• Encyclopedia Mythica has information on lots of gods, this section on the Norse
• Wikipedia always has info on just about any subject
• Gareth Long has a good essay comparing Greek to Norse mythology

There are, of course, as many other gods and pantheons as there have been societies in the past. Thankfully, there are sites that are pan-pantheonic:

• GodChecker.com offers the most comprehensive information on the web
• Flickr has a nice set of Lego gods and goddesses
• Thorshof offers you some help in "Choosing A Heathen Diety"

Don't foget to make the appropriate sacrifices and to check out the more modern gods from Neil Gaiman's American Gods.