Ask HN: Service to distribute beta invites?

[bravura]

Does anyone know a webservice that will distribute invites to your beta site? One that allows invitees to invite, say, 6 other friends.

I believe I saw this a few weeks ago, but can't find it now.

[dannyr]

bravura,

My site Launchset distributes beta invites but I don't have functionality yet for other users distributing invites.