Well if you played the songs after 12pm (UK time) yesterday, they won't be included in your weekly charts until next week, as they go from midday Sunday until midday the next Sunday.
And neighbours do take time to be generated, so just be patient and they'll appear soon enough :)
It is confirmed that neighbour calculations are slow at the moment. He sure has listened enough tracks to have some.
But I start wondering if there's beyond that, a minimum number of artists you need on your profile (what would be reasonable to expect for a decent calculation of course). This user had 46 artists on his list.
Wenslauw, will you let us know how many artists you have when you finally see your neighbours appear?
no neighbours after playing over a 1000 songs and weekly count is wrong