From my Android Dev Phone 1, running the 1.5 "cupcake" firmware
"Mozilla/5.0 (Linux; U; Android 1.5; en-us; Android Dev Phone 1 Build/CRB21) AppleWebKit/528.5+ (KHTML, like Gecko) Version/3.1.2 Mobile Safari/525.20.1"
Others collected from my apache logs:
"Mozilla/5.0 (Linux; U; Android 1.0; en-us; dream) AppleWebKit/525.10+ (KHTML, like Gecko) Version/3.0.4 Mobile Safari/523.12.2" "Mozilla/5.0 (Linux; U; Android 1.1; en-au; dream) AppleWebKit/525.10+ (KHTML, like Gecko) Version/3.0.4 Mobile Safari/523.12.2" "Mozilla/5.0 (Linux; U; Android 1.1; en-us; dream) AppleWebKit/525.10+ (KHTML, like Gecko) Version/3.0.4 Mobile Safari/523.12.2" "Mozilla/5.0 (Linux; U; Android 1.5; en-; Android Dev Phone 1 Build/CRB21) AppleWebKit/528.5+ (KHTML, like Gecko) Version/3.1.2 Mobile Safari/525.20.1" "Mozilla/5.0 (Linux; U; Android 1.5; en-gb; T-Mobile G1 Build/CRB43) AppleWebKit/528.5+ (KHTML, like Gecko) Version/3.1.2 Mobile Safari/525.20.1" "Mozilla/5.0 (Linux; U; Android 1.5; en-us; Android Dev Phone 1 Build/CRB21) AppleWebKit/528.5+ (KHTML, like Gecko) Version/3.1.2 Mobile Safari/525.20.1" "Mozilla/5.0 (Linux; U; Android 1.5; en-us; Android Dev Phone 1 Build/CRB43) AppleWebKit/528.5+ (KHTML, like Gecko) Version/3.1.2 Mobile Safari/525.20.1" "Mozilla/5.0 (Linux; U; Android 1.5; en-au; HTC Dream Build/CRB43) AppleWebKit/528.5+ (KHTML, like Gecko) Version/3.1.2 Mobile Safari/525.20.1"