Everybody who's interested in text adventures: check out freeware 'engines' like TADS or ALAN. These are quite handy to create text adventures (or 'interactive fiction' as most adventurewriters seem to prefer). Obviously you can do it in Blitz too, but then you have to write your own parser and stuff like that. On the TADS and ALAN sites are also lots of links to sites which go in detail about designing adventures, apart from the technical stuff. Although I didn't use these apps much, I had great fun exploring them. Check out
http://www.tads.org/
http://users.actrix.co.nz/stevgrif/
http://www.tads.org/
http://users.actrix.co.nz/stevgrif/