My Feb is half the usual. I've noticed my top Yahoo SERPS, where nearly all my traffic comes from, are all over the place, up and down all day. Their data centres are having fun I think.
February is great, already had records in visitors, ad views, ad clicks and ad earnings topped on 5 different ocasions this month :-D
I suppose the ones losing the SERPS are gaining other people SERPS hehe. Rod, my serps are crazy too... people could say its "sandbox effect" but i doubt it because i have had steady positions for 2 months :/ its just the fluctuating google "update" that seems to "may be" going on
And for that exact reason it is good to have several sites for each niche, so in that case if one site is down in serps for some reason, the other one might be up, so it will all average out at the end. It is also a good way to have good traffic exchange partners so that you do not have to rely solely on SE's for traffic