Yes, I think Roomba is very good and valuable, I have a year old Roomba, but today they are selling the 500 series which seem more intelligent and quieter. My Roomba is not quiet, it isn't fun to be in the same room for a long time. But if you are not home during the day, it's easy to just press Clean and let Roomba vacuum your house. A good link with lots of information is this

Thanks, I'll try the Omega drivers, and I'll also reinstall 6.40 to check that it still works. Due to a hard disk format in the summer I haven't reinstalled 6.4, instead waited for A7 to become stable enough. The reformatting was by the way one of the best things I've did for my computer (and myself)!