Yes. It is still a U.S Territory. I doubt it will ever seperate from the US. In fact in 3 - 4 years all the troop from Japan are going to be based here on Guam since Japan is requesting the troops leave. So a lot of construction is going on in order to support the build up.
Guam is great, like Hawaii...well maybe a bit hotter. Only two season, rainy and dry.
P.S - Hows the quality of the LR atties from Eastmall? Do they perform the same as or better then the Joye/SLB/Bauway LR atties?