In addition to performance improvements, support for F# and Azure projects have been added. The core has also been updated to Subversion 1.6.9. I’ve only been using it for a day, but it does appear to be much quicker than the 1.7.x versions, so I highly recommend you go get the bits.
If you are not using VisualSVN, see my blog post on why it’s worth the price here. You can grab the bits from the VisualSVN site here.