<a href="http://www.caribbean-on-line.com/bv/ttmap.shtml">Tortola</a> is great - there are a lot of nice beaches (Brewer's Bay, Cane Garden Bay, Apple Bay, <a href="http://www.virgin-islands-on-line.com/coconut-telegraph/archives/000595.shtml">Long Bay</a>, etc.), especially on the north side.
You can also visit <a href="http://www.virgin-islands-on-line.com/coconut-telegraph/archives/000478.shtml">Sage Mountain National Park</a>, just one of <a href="http://www.caribbean-on-line.com/bv/bve.shtml">Nature's Little Secrets</a>.
We also have a <a href="http://www.caribbean-on-line.com/bv/bvv.shtml">BVI villa rentals</a> page with a lot of reputable agents and villas.
Have fun -
Anthony for Caribbean-On-Line