Well one easy thing I would suggest so you don't have to go through and rip all of your cds again, you can download a free WMA to MP3 converter to do them all for you while you sleep, no cd swapping! There are plenty of them out there, most of them free to try then you have to buy them. One I came across can be found:
Is completely freeware.
That will help if you're just concerned in converting them. As far as the albulm art, I've never really ripped audio cds with the art- I used to use a nice free program called CDEX that does a good job as far as ripping and naming, but now use Winamp Pro. Since I use it with my remote setup it is very convienient for me, and with my network internet connection it easily grabs the cd art as well as other helpful links, reviews, other albulms, bios, etc.
Hope that will help you some, and hopefully someone will know offhand and help you with the albulm art portion- Good luck!