I'm firmly in the "incremental improvements" camp. Build something that does something useful for the users. Then add to it incrementally and constantly review for potential improvements. Be ready to drop whole sections of functionality and code if they are no longer needed/useful or if they can be supplanted by something better.
Extinction is the result of too low a mutation rate in a changing environment.
- Gus "GSquared", RSVP, OODA, MAP, NMVP, FAQ, SAT, SQL, DNA, RNA, UOI, IOU, AM, PM, AD, BC, BCE, USA, UN, CF, ROFL, LOL, ETC
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"Nobody knows the age of the human race, but everyone agrees it's old enough to know better." - Anon