How many servers do I need to handle 100 mln hits per month?
brk: What does a "hit" consist of?A static text page?A static text page with a few images?How many of the hits will be from (and/or NEED to be from) database-driven queries?How much of a "hit" can be cached?Are visitors typically repeat (where browser-cached objects could be of benefit) or new (where you'll need to look more at CDN caching)?