Hey Proboscis,
One SHB is not a problem, many SHB can be a problem. Locating your hive in the sun can help, the SHB seem to like shady hives better then ones located in the sun. Also a strong hive will keep the SHB under control.
Picture of small hive beetle. Google small hive beetle to see other pictures.
http://www.google.com/imgres?imgurl=htt ... s%3Disch:1