New Hotline/Financial Dynamics national poll of registered voters conducted post-convention (August 29-31) shows Obama getting a 5-point bounce and expanding his lead over McCain to 9 points:

Obama-Biden 48 (+4 vs. last poll August 18-24)
McCain-Palin 39 (-1)

Overall, Obama's lead in the RCP National Average jumped to 6.0%, matching his biggest lead since July 6.