The 28th Massachusetts Regiment's Web site is what a nice, clean reenactor Web site should be. Plenty of information placed in a great layout that is easy to follow.
I found that the unit history is a must read. It is not only well written, it's compellingly well written. It's easy to follow the history of this unit from its beginning til its end in July 1865. The other thing I really like about this site is the amount of research done. It has a great page on what muskets the unit used, and the research to back it up. The site as a whole is very consistent.
If your a Webmaster, then check this site out for some great ideas.