OpenAccess is a fantastic piece of software....being able to query your database with a bunch of quick linq queries (whos results are cachable) is pretty cool.
One big hurdle though in migrating over existing databases is that (if you're like us) we use a lot of stored procedures. Right now OpenAccess can handle those, but you get back ugly generic object arrays. I like my strongly typed objects! :)
There's an open issue in PITS to help prioritize this issue, but my one meesly vote I don't think will help bump it's priority anywhere. If you have a moment please head over and click to vote.