I've revised the Seeker handbook here. This is a discussion thread about the new handbook for those on EnWorld. It is also linked to in the WotC Rescue Handbook thread.
Hope people enjoy, I've had a lot of fun playing a variety of 4e Seekers and wanted to revise.
Given that there tends to be some free feats given out in many 4e games to fix the feat tax problem of missing a +1/2/3 to hit/NADs, I've given them in most cases a free feat or two in response to that. If that isn't happening, the feats in question are almost certainly valuable enough to be gotten early and just delay some of the feat choices until 14/16 instead.