You might not blink at a 5 minute outage, but I'd have folks beating on my door if our site was down...
Note I speak for myself, and not Liferay or other marketplace downloaders...
For only a single entity, a SB implementation would not seem to be that big of a deal... An alternative would, of course, be portlet preferences. A nice little prefs page for admins to set what they want, apply to the portlet, no SB or JNDI config required, and no outages on my end to deal with...
Just a suggestion...