Nice to meet you, Clarii! If you're looking for good ADV images, there are literally hundreds of different ones spread throughout the 463 pages of this topic. The Shipping Pictures topic has some too, but they are not as many and will probably all be posted in here anyways.
As for fanfics, I can recommend A New Generation, A New Beginning by elite4james, and A Passion Revived by Ariemeraldstar (known on BMGf as Edo-kun). I won't bother listing anything by PikamasterADV since most people are aware of May's Crush and the ilk, but I highly recommend anything by LuciferIX.
If you're looking for something a bit more mature and dark than the typical story, PKM Rangers: Rise of the Dark Gems is a must-read. And then of course, there's my own Advanceshipping fanfics: my best known story, Final Challenge, and my two more recent stories, Peril and [i]May's Birthday[i] (might be one to save for Valentine's Day though).
Hope these recommendations help, and welcome to the club!