I've hired to VA's from
www.odesk.com and they're great. They're MUCH cheaper than on AskSunday (mine are $3 (Filipino native who's done her schooling in English) and $4 (semi-retired English guy living in Spain) an hour), they write great articles ($3.50 for a 550 word article), and the oDesk payment process is really transparent.
They only get paid for the hours they're logged onto the oDesk system doing work so you don't have to ask for time sheets or anything like that. Whilst they're logged on, the oDesk software takes random screen shots of their computer so they can't cheat you. It also monitors that amount of minutes that there's activity on the screen so you can tell if they've just logged onto a screen and left it running while they make lunch. On top of this, they have to leave notes explaining exactly what they were working on in that 10 minute block.
So far, I've had 9 websites set up, 3 550 word articles, and 3 2000 word articles written and it's cost me less than $30 total.
Oh, and my $3/hour Filipino assistant is a qualified account who's doing all my books for me and my $4/hour English assistant has run his own business's for most of his life and is drafting a business plan for me.
Smartest decision I've ever made.
Check out oDesk, I highly recommend it.