MyLife

US $8 per month for a private server, recommended for up to four 100,000-prim regions and up to 15 simultaneous visitors, on the MyLife grid. No hypergrid, no voice, Gloebit currency.

Other server sizes also available:

$10 per month for a server recommended for up to eight regions and 25 simultaneous visitors.

$22 per month for a server recommended for up to 16 regions and 50 visitors.

$50 per month for a server recommended for up to 24 regions and 100 visitors.

Full technical details here.