The best replacement for s90 is s95.

The best alternatives to s90 are rated as following:
★★★★★  s95
★★★★  lx3
★★★★  g11
★★  lx5
★★  panasonic lx3
★  motif
★  s110
★  g12
★  s90es
★  canon g11
★  sx210
★  s95 canon
★  canon s95
  lumix lx3
  gf1
  sd4000
  sony tx7
  dsc s60
  panasonic lx5
  triton le
  sony wx1
  lumix gf1
  sx200
  mo8

Your alternative for s90 is not listed? Suggest!
Speaking about s90, one probably shouldn't forget about chdk.

Other search terms related to s90 and their ratings are:
★★★★★ chdk
You have in mind a companion for s90 and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of s90 in all years. Click on graph for more.
s90
s95
lx3