Absolutely! BigLaw is (was?) a house of cards waiting for the right circumstances to blow it over. My law practice is only part time, and I run it like my software company operates - lean, innovative and hellbent on providing really good value for clients. I have more than enough legal clients in the pipeline to keep me busy and my startup background gives me a great foundation for advising my target clients. As for tools to run my practice, if I can't get what I need at a reasonable price I build it and make it available to my colleagues at a reasonable price.
