Libraries and Digital Repositories

Here at work we are looking into having an organisational "Digital Repository".  I emailed a few e-lists the other day to see if any small libraries had digital repository. I got a number of responses that all pointed to dSpace. Are any of you out there using dSpace? Are you using something else? Thoughts? How do you go about it? Does the library run the project or is it another department? Is the repository well used? Up to date? Highly regarded? Any insights are most appreciated as I start along this journey.