I haven't been noticing any abnormal issues with page load times with the main site (
http://www.rpgmakerweb.com/), though I have noticed issues with the forums and the blog since yesterday.
At roughly 5:00pm UTC -4:00 (EDT), the forums (
http://forums.rpgmakerweb.com/) and blog (http://blog.rpgmakerweb.com/) became inaccessible to me. I attempted to resolve the domains via my main internet connection (with multiple DNS configurations), via SSH proxy through a VPS, and through the Tor Network. All of these points of origin failed. I additionally checked via a web service (http://isup.me/), and it too found the sites to be down. About 30 minutes later (5:30pm EDT), they returned to an accesible state, but were quite sluggish. This continues on until present, as deilin has detailed above.
Upon further investigation through a traceroute, I found that the main site and the forums/blog are hosted separately, ending at apache2-yak.soy.dreamhost.com (208.113.206.103). The main site is served via Amazon Web Services, but the forums and blog are hosted by Dreamhost on a server located out of California. There didn't seem to be any issues with me reaching the server, and other sites hosted on it (the same machine) loaded fine (e.g.
http://blog.avg.co.jp/). This leads me to believe that it is an isolated issue with RPGMakerWeb, and rules out things like DDOS.