Every music site is doin' 'em, but here's a few sites & blogs (including mine) that have gathered together and are cross promoting each others' Best of/Year End/Top whatever lists.

All Metal Resource
Bring Back Glam
Hard Rock Hideout
Hair Metal Mansion
Heavy Metal Addiction
Heavy Metal Time Machine
Imagine Echoes
Layla’s Classic RockMetal Excess
Metal Excess
The Metal Minute
The Ripple Effect
Rock And Roll and Meandering Nonsense
Rock Of Ages