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This is definately not a no-no. *Services* are where the added value is in the world of open source software, as opposed to *code* (note: not the service of coding), which is what you pay fo in the proprietary software world.
There are several veterans out there that can give you advice: Mithrandir, Hyperpod, Ackbarr, Predator, etc. etc. (these are just off the top of my hat, in no particular order).
Herko