Good to see this getting some attention after it was passed over for the GSoC last year *.

A possibly less cumbersome alternative way for the curious to install is using fapman (choose the "All packages (ADVANCED)" under Category Filters and then search for sphinx). You don't need any of the debug packages or the two chinese model packages; install all the others. I did notice that the packages aren't optified, which means that with the available acoustic and language models you could eat up over 13MB root space. Consider yourself warned. I haven't access to my linux box to re-upload the packages with optification.

Worth a giggle if nothing else. With the provided large dictionary and language model the result of talking to your N900 is rather comical.

Edit: Removed command -- the default works fine.