Over 90% of all Android devices powered by either Froyo or Eclair, Honeycomb scores 0.2%
The two Gingerbread versions, which are 2.3 and 2.3.3., have a share of 0.7% and 1%, respectively, while the tablet-only Honeycomb (with the Motorola XOOM its sole representative) powers 0.2% of all Android devices. The old guard of Google's mobile OS is still present - Donut scored 4.8%, while Cupcake has 3.0%. The poor old Androids.
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source: Android Developers via Engadget