He may be talking about a replaceable derailleur hanger, as he used on the Giovanni 98.

Gear bosses may refer to DT bosses allowing DT shifters or cable stops to be used, as opposed to brazed cable stops at the HT.

If you are set on 1 1/8, don't bother with a steel fork (reduced price I assume) as they are HEAVY in 1 1/8 generally. Outfit it with a Reynolds/Alpha/Enve/Serotta painted to match.

See if they will send it by EMS/Post/TNT and NOT by FedEx or UPS...you will most likely not incur customs charges then.

If you are interested in a lugged Spirit frame, you may want to check out this guy as well: http://www.forestaframes.com
If you are looking for reasonably priced fillet brazed, check out Meech: http://meechcustombikes.blogspot.com/