Find out who their customers are-that reveals a lot. If you're not sure, start small.
Several companies start off by collocating a single application or server at a time.
Don't hire an ISP unless you're absolutely sure it understands your business . If it can't provide a solution for you from its standard offerings, it may be time for a custom job. In that case, find out if custom hosting is one of its s pecialties. Ask about available bandwidth . In that case, your customers could be left out in the cold.