Linksys is shipping the WAP11 version 2.2 (why don't they ever change the model name?) These can be bought in stores already. So beware.
Significant differences are the following:
1. Firmware is totally different. No upgrades available yet.
2. Netstumbler shows a blank vendor for the WAP11v2.2.
Links:
Datasheet ftp://ftp.linksys.com/datasheet/wap11v22_ds.pdf
Product info page http://www.linksys.com/support/support.asp?spid=91
The main Linksys products page doesn't show this yet. It still lists the WAP11 (not v2.2) Hmm.
Example below. The first two APs are WAP11v2.2, the third is a BEFW11S4. Note the MAC prefix is different, too.
This explains all those empty vendors in my growing list!