Yes but not as much as I like to. The guys who build a project management tool may benefit the most I think.
We are building a site to engage people to write daily (in English), www.dailythem.es, and while I know using the site more is very useful, I have to keep thinking about the business direction and figure out user demographic before I spend all days using my own product.
In this case I probably should consider myself happy: I'm on the developer team of Collabtive, a free open source Basecamp alternative, i.e. a project management software.
In fact it is very easy to use our own product not only for project management in the strict sense of the term, but also for bug tracking, file storage and distribution and community management.
Besides it being useful for us, we have already been able to put a lot of our own requirements into the published version.
We are building a site to engage people to write daily (in English), www.dailythem.es, and while I know using the site more is very useful, I have to keep thinking about the business direction and figure out user demographic before I spend all days using my own product.