I would agree that an OU degree could be worth more to an employer than a standard university degree.
If you have held down a job/family etc, whilst completing your degree it shows that you are dedicated and passionate, and that you have not spent 3 years in the SU bar! ( A friend of mine completed her pure maths and statistics OU degree in 3 years, while working full time, moving house, having a miscarriage and getting married - not all in that order!)
Now before you all purists shout, of course degrees from some uni's are "worth" more to employers in some professions, and i know not ALL student life revolves around beer and parties, but at the end of the day the other qualities that you bring to an interview/workplace can be just as important.
In this current climate, just "having a degree" isnt enough, no matter where it is from. (How many super intelligent 1:1 graduates have any common sense?
sorry dont mean to offend and my son is at uni doing a degree)
I did the 1st year of an OU degree and really enjoyed it - and the support was great too.
Go for it and see how you get on.
Katie