A OpenPlans anunciou semana passada o lançamento do GeoWebCache, não é um projeto maduro com o TileCache, porém tem suas vantagens, como por exemplo roda em um servidor que não tem suporte a Python. Ele pode rodar no Tomcat, ou no próprio Jetty, como o GeoServer.
“GeoWebCache is finally out in the open and announced on freshmeat.net and other pages. This should really have happened a long time ago, and there are many reasons for why it didn’t, but I am very excited about the current momentum.
GeoWebCache, is a tile cache, meaning it acts as a proxy between the client and the WMS server (GeoServer) and stores the image. If another client requests the tile it can respond in milliseconds, regardless of the complexity of the tile. It is different from a regular HTTP proxy, such as Squid, in that it interprets the parameters and matches them to the best tile supported by the configuration.”
Fonte: Blog do GeoServer