HP has announced that its TouchPad tablet will start shipping on July 1st.In the US, the tablet will be up for pre-order starting June 19th. The HP TouchPad will be available in two models. The 16GB model will run $499, while the 32GB model is priced at $599. 3G-enabled models are not expected to be available until later this year. The HP TouchPad runs webOS 3.0 which is a version of the webOS