Pretty much all the services successes in the 90s were focused on the 'web-enabling' and 'migration' space, and with that space now crawling with IT services vendors (domestic and overseas), the growth opportunities, while definitely present, are more difficult for a startup to tap. With all the big IT behemoths working on broadening their offerings to be the 'vendor of choice' for the enterprise customers, it is very difficult for a point-product vendor to avoid the 'tractor-beam' of an exit (just like Red Hat and JBoss!).