Found this on Yahoo, which quotes “Scout.com”.
According to the Houston Chronicle, a published report said the Astros have been working on a deal to acquire Dunn for prospects Ezequiel Astacio, Taylor Buchholz and Fernando Nieve . But Houston GM Tim Purpura said the rumored trade was a “media fabrication.”
Then it talks about him possibly going to St. Louis:
The Cincinnati Reds have had scouts in Memphis recently looking at pitching prospects Adam Wainwright and Anthony Reyes in anticipation of a potential deal with St. Louis that could involve Adam Dunn.
While it is highly unlikely that the Cardinals will part with their Top Prospect, Anthony Reyes. it is possible a deal could be made with Reds to bring Dunn to St. Louis.
The article finishes by singing Dunn’s praises as one of the best young power hitters in the game. Praise he rarely, if ever, receives in the Cincinnati media.