Mine's been going a similar route... I actually even relocated because the job description sounded pretty exciting (technically challenging, even), but it ended up being the same sort of thing as the government contracting work that I was trying to escape from, but with even older technology. Since it ended up being largely a software life-support role, I'm working on bootstrapping my own business interests... but my focus isn't on software, it's on photography. I've spent so much time in roles like this one that I'm getting tired of the field altogether, mainly because life-support jobs are so anti-creative.
So I "eased" my way in. I switched to working part-time (again, I had the fortune to work with great people at the time - they were sorry to see me go, but very supportive of my decision). It eventually became obvious that even part-time work was too big a distraction, so I quit entirely after about a month.
Not the most spectacular story, but I haven't regretted the decision.