My bike comes stock with this thing, which must be filled with lead:
http://www.fullspeedahead.com/products/ ... d-Seatpost" onclick="window.open(this.href);return false;

It seems like an easy target for weight savings, BUT I cannot seem to find anyone else who makes this shape topper in something carbon/alu. Thoughts? If no other toppers are available in this shape, are there part swaps I could do to lighten it up?

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Museeuw MC-2, Sram Red/Force, Reynolds 32, Power2Max -- 6.62 kg
Stevens Carbon Team CX, Srampagnolo (Record 10sp + Force) -- Heavy

looks similar to one that fits on the Litespeed CR series. don't know of any replacements that are lighter.

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- Crumpton SL + Campy SR11 + Enve 3.4 CK hubs
- Parlee Z5 SL + DA9000 + Enve 3.4 DT240 hubs

Bummer. Seems at least 100g heavier than others on the market.

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Museeuw MC-2, Sram Red/Force, Reynolds 32, Power2Max -- 6.62 kg
Stevens Carbon Team CX, Srampagnolo (Record 10sp + Force) -- Heavy