Eldritch Sorcery is OK. I picked it up at Origins, and have paged through it. Some of the spells seem like they needed more editing, but there are so few books devoted solely to spells that it was still a good purchase.
Spells are near and dear to my heart. I really do hope to spend time this fall doing some of these conversions. My 12th level wizard will hopefully reap the benefits.
when the Monster Geographica series is complete (a year or two from now? i really don't know) i will have a whole lot more time for projects like this. in the meantime, anyone else who wants to have a go is more than welcome!
Updated the College of Wizardry thread linked above, so I wanted to bump my other friend, here, too.
I started a wiki somewhere to host spell conversions, but when I lost my HDD in June, I lost all login info. Dumb is me... hopefully I'll find it again sometime.