A collection of other embedded net processors
(most of which I've never tried, and most of which I've gotten from others)

• http://www.embeddedethernet.com
• Embedded Ethernet controller - an ethernet controller. This one isn't a standalone microcontroller at all. It interfaces to your microcontroller (takes 16 pins) and allows you to do everything that Ethernet can do at a very low level. Not for the technically faint of heart at all. But very powerful it you need to do a lot fo low-level stuff. Matt Daughtrey, who sells it, works nearby and is very helpful.
• SitePlayer - from NetMedia, who make the BX-24. A web server on a chip. Fairly simple to use, but limited, in that it can only respond to hits from the outside. It can't initiate outgoing net messages yet, though word is that is coming soon in a new version.
• a SitePlayer FAQ from a dedicated user. More detail than the siteplayer site has on specific applications.
• my notes on the siteplayer
• CoBox Micro - a serial-to-ethernet converter, pretty simple to use. my notes on it
• TINI - Java-based embedded server from Dallas Semi. This one has a full network operating system that you can telnet and FTP into. You program it in Java, and it can do most anything Java can do, within the limits of the hardware. It's more complex to get going with than the SitePlayer, and much larger, but a decent product nonetheless.
• Tini - my notes on it

• PicoWeb - Another server on a chip, unlike the SitePlayer, it can do limited outgoing messages. A little more expensive, and a little less easy to program than the SitePlayer.
  
• Lineo uCSimm - an embedded LINUX computer. It ain't cheap, but if you're a serious LINUX person, and technically very comfortable, you might find this a very powerful option.
  
• RabbitCore - A range of ethernet-enabled mocrocontroller interfaces, programmable in C.
  
• Net to Anything - Another embedded net controller; I have never tried this one.
  
• Cermetek modem - a modem kit designed to be used with the Basic Stamp, would be easily usable with the PIC or BX-24
  
• Mesh routers - wireless ethernet network extenders/repeaters.

• PacketWhacker - functionally the same as the embedded ethernet board from Matt Daughtrey
  
• EasyTCP - a few models of serial-to-ethernet modules similar in form factor to the Siteplayer. They also have a PPP-capable module.
  
• http://www.ethernut.de/en/
  
• http://web51.hw-server.com/
  
• http://www.letbasic.com/
  
• http://jstik.systronix.com/
  
• http://www.rabbitsemiconductor.com/products/coreModules.html
  
• http://www.netburner.com/
  
• http://www.netsilicon.com/
  
• http://jstik.systronix.com/compare.htm
  
  Good comparison of several alternatives

• http://www.geocities.com/stampic/links.htm
  
• http://www.digi.com/applications/industrial%20automation/products/deviceservrs.jsp
  
• http://www.sanpeople.com/Products/products.asp
  
• http://www.tibbo.com/
  
• http://www.newportus.com/i/EIS-W.htm
  
• http://www.netserial.net/products_nport.htm
  
• http://www.edasce.com/
  
• http://www.moxa.com/product/single_port_serial/nport_express.htm
  
• http://www.moxa.com/product/nport/nport.htm
  
• http://www.dcbnet.com/datasheet/ss1ds.html?GoogleGroup4
  
• http://www.patton.com/cgi-patton/catalog-bin/display.cgi?model=2120&sc=gas&mc=2120-2&bc=mtsdsste