There was a Grand Prix in Brazil on Thursday. See the following article for a description:
http://www.iaaf.org/WAF08/news/kind=100/newsid=44992.html
The article doesn't include a list to full results but we found the results for the men's 800. They include 2004 US Olympic Trials champ Jonathan Johnson.
Men
800 m
1 Ismael Kombich KEN 1:44.90 PB (#4 world outdoors) 2 Gilbert Kipchoge KEN 1:45.88 SB
3 Kléberson Davide BRA 1:46.49
4 Jonathan Johnson USA 1:46.90 SB
5 Sherridan Kirk TRI 1:47.02
6 John Litei KEN 1:47.52
7 Fabiano Peçanha BRA 1:47.84
Johnson will race again on Sunday in Brazil.