It looks like HP has quietly upgraded the iPAQ hx2190 and hx2490 from 128 MB to 192 MB of ROM. This brings those models inline with the iPAQ hx2790 which shipped with 192 MB of Flash memory from its announcement.
A look at the HP web site shows that many pages are now reflecting the change. A Pocket PC Thoughts reader has also seen the new models with upgraded ROM at CompUSA.
Source: Pocket PC Thoughts