Can you ping mirror.slitaz.org ?
The mirror is working here :
tux@slitaz:~$ sudo tazpkg recharge
Creating backup of the last packages list...                         [ OK ]
Connecting to mirror.slitaz.org (94.23.60.116:80)
packages.desc        100% |*******************************|   232k 00:00:00 ETA
Connecting to mirror.slitaz.org (94.23.60.116:80)
packages.md5         100% |*******************************|   132k 00:00:00 ETA
Connecting to mirror.slitaz.org (94.23.60.116:80)
packages.txt         100% |*******************************|   208k 00:00:00 ETA
Connecting to mirror.slitaz.org (94.23.60.116:80)
packages.list        100% |*******************************| 41568  --:--:-- ETA
Connecting to mirror.slitaz.org (94.23.60.116:80)
packages.equiv       100% |*******************************|  1264  --:--:-- ETA
Connecting to mirror.slitaz.org (94.23.60.116:80)
files.list.lzma      100% |*******************************|   892k 00:00:00 ETA
Connecting to mirror.slitaz.org (94.23.60.116:80)
mirrors              100% |*******************************|   665  --:--:-- ETA
Mirrored packages diff
================================================================================
0 new packages on the mirror.
tux@slitaz:~$ ping -c 6 mirror.slitaz.org
PING mirror.slitaz.org (94.23.60.116): 56 data bytes
64 bytes from 94.23.60.116: seq=0 ttl=50 time=119.036 ms
64 bytes from 94.23.60.116: seq=1 ttl=50 time=118.601 ms
64 bytes from 94.23.60.116: seq=2 ttl=50 time=116.981 ms
64 bytes from 94.23.60.116: seq=3 ttl=50 time=118.768 ms
64 bytes from 94.23.60.116: seq=4 ttl=50 time=117.466 ms
64 bytes from 94.23.60.116: seq=5 ttl=50 time=118.870 ms
--- mirror.slitaz.org ping statistics ---
6 packets transmitted, 6 packets received, 0% packet loss
round-trip min/avg/max = 116.981/118.287/119.036 ms