[asdfaoeu]

You're practically limited to h.264 anyway on mobile devices none of the hardware has support for anything else.

[fpgeek]

Every Gingerbread and up phone has support for WebM.

[icebraining]

Hardware support?

[DannyBee]

Newer SOC's have hardware support for it.

OMAP4470 supports it in hardware (so galaxy nexus like phones).

OMAP54XX supports it in hardware.

Tegra 3 supports it in hardware.

So just in time for this development ;)