Here's a selection of hypertext stories available for free on the Web, to help you get an idea of the range of the genre, and perhaps inspire some ideas in your own work:

Grammatron
Written by Mark Amerika, this hypertext's prose is as sprawling and dizzying as the graphics that accompany it.

In the Changing Room
A set of eight stories can be followed linearly to their conclusion, or readers may choose to leap from one to another via hyperlinks.

Mansion of Maleficence
An online gamebook in the style of Fighting Fantasy.

Project Aon
Almost all of the gamebooks of the Lone Wolf print series are available online.

Six Sex Scenes
This hypertext pulls links from each passage to the bottom of the page, separating the text cleanly from reader choices.

Techno-Shamans in Texas
Posted in the infancy of the Web by John Hargrave, this is a travelogue in the style of Hunter S. Thompson that uses hyperlinks to draw thematic connections.

Victory Garden (excerpted)
This is a cutting from Stuart Moulthrop's critically acclaimed hypertext story set in the early days of Operation Desert Storm.