Don't bother with them if you want anything more then a personal site. Their slowness and downtime will eat any commercial site alive. I'm a long time member but I can't use them for more then my blog and photos (I have lots and lots - more then 10 gigs and that would fill up most vps's) because when it comes to sites for other people you'll just loose customers.

I'm editing to add that I'm looking for a way to move my gallery (10+ gigs of photos) over to slicehost with a mounted "S3 volume" I'm not sure of the performance hits, but I'm willing to bet I'll get a faster site out of it.