This. Is. Awesome.
Before Arcane Power is even out, we get a slew of new familiars for all tiers: 13 for Heroic, 14 for Paragon, and 4 for Epic. There's a section on choosing a familiar based on your personality, class, or spell style, personalities and quirks given for each individual familiar, a paragon path that enhances it, and four new feats.
This is an excellent article, filled with crunch that everyone can use if you like familiars at all. There's a lot of cool stuff packed here that I'm looking forward to using with my tiefling bard and fire-based wizard. Hell, I'm tempted to take Arcane Familiar with basically every arcane character I play, now.