Hmm, personally, the BBS is the same for me as it was back in the middle of 08. Yeah, there's noobish users who make those "Hi, Im new" threads or something similar, but it's not like whatever mod attends to it flips out and bans the noob for 30 days. Which takes me to my next point, the mods.
A lot of the mods here are fairly agreeable (Jonas, Mal, etc), and all of the mods do a pretty decent job at keeping the good stuff in the BBS good and the shit out. Yeah, the occasional spam thread flies, and usually, an unsuspecting user gets B&, but honestly, are the bans that long? Most are about 1-2 days.
Maybe another mod could be necessary, though, in the near future. Obviously, issues with the time-zones would warrant it, but the level of spam threads does not warrant another mod. We're not /b/, after all.
Personally, I dont think the BBS is really declining. But, I wouldnt really know. Is this how the 05-07 users felt when 08 rolled in?