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Any business needs: 1. to be able to change upstream providers without having to renumber.
Why? Intelligent use of DNS and dhcp make renumbering only a minor inconvenience.
2. to be able to change access providers without having to suffer multi-month down-times.
Mission/business critical services should be in a co-lo anyway and not off a DSL line.
3. to be able to have its net-block(s) visible regardless of which ISPs they are currently using.
How do you propose doing this without growing the routing table 1-2 orders of magnitude?
Currently the only ones that can do that are those that; 1. Are large enough to justify a /20 (begging the question of how they got that large). 2. Can afford their own datacenter.
It looks like our technical solutions are raising unreasonable barriers to entry for small businesses.
No. Co-lo your website and "intranet". Get two T1's that same provider via two different entry points/carriers to your office (if possible) and you should be about as rock solid you could expect for $2-3000/month or there abouts. Peter