There are pros and cons. You can get hired there right away and get some really good experience. There are a lot of senior guys there so it will be a good learning experience flying the Dash. A downside in relation to that is a slow upgrade with all of those older fellas there. Another downside, from what I hear on the board here, is that the leases on the -8's are up in two years, and neither PDT nor US Airways (who owns Piedmont) has suggested that there are any plans to replace them with either jets or other turboprops. There are definitely better regionals out there, and you'll get a feel for that very quickly on the board (if not the continuation of this thread), but it all depends on what you're looking for right now and what your plans for the future are. Also, pay scales aren't bad at PDT (though they could be better), considering you'll be flying a turboprop and not a jet, and there's a signing bonus too.
There are some PDT pilots on here, so they might have some more specific insight for ya.